Babylonia Singularity

Babylonia: The Absolute Frontline in the War Against the Demonic Beasts (絶対魔獣戦線), alternatively The Chain of Heaven (天の鎖), was the last of the seven primary Singularities in the Human Order Incineration Incident. Located in Mesopotamia, B.C. 2655, it's Humanity Foundation Value was A++.

Setting
The Singularity occurred in Mesopotamia in 2655 B.C. during the latter part of Gilgamesh's reign. Solomon personally sent one of his Holy Grail into the era, and pulled Tiamat from the World of the Void. When this happened, Gilgamesh, who just returned from the underworld, foresaw Uruk's destruction, and inscribed his vision in the Tablet of Destinies. Leaving the tablet in Kutha, he returned to Uruk, and told his subjects of his vision. He then took the role of a mage to protect Mesopotamia, and began to prepare its people for their impending doom. . Meanwhile, Merlin trapped Tiamat in a dream to prevent her return. However, she was able to implant the Grail into Enkidu's corpse to reanimate it for the purpose of awakening her, calling it Kingu. Kingu believe themselves to be Tiamat's child, and they are the prototype of a new humanity based on Enkidu. While searching for a way to awaken Tiamat, they eventually found Gorgon, who was summoned by the Grail's influence, in northern Mesopotamia. After they restored her Divinity, she gained the Authority Potnia Theron, which allows the creation of monsters, by synchronizing with Tiamat's consciousness. As a result of the synchronization, Gorgon is deluded into believing she is Tiamat's second coming, and decides to take revenge on humanity in her stead. However, because she isn't Tiamat, Gorgon isn't able to use Potnia Theron to create monsters by herself. Thus, she is forced to capture humans and bring them to her temple in the Cedar Forest, the Blood Fort, where they're converted into Demonic Beasts. They are then sent out to capture more humans to bring them back to the Blood Fort so more Demonic Beasts can be created. Meanwhile, Medusa is summoned in her child form in the Cedar Forest by the Grail's influence. She would keep herself sustained by feeding on the souls of the Demonic Beasts she killed.

With the appearance of Demonic Beasts in the north, the era began to turn into a Singularity. Gilgamesh ordered Babylon to be dismantled, and used to a build wall to seal off the north from the rest of Mesopotamia. The sacred temple however foresaw the era would turn into a Singularity, and decided to summon Ishtar without Gilgamesh's knowledge. While the Northern Wall was constructed, the temple matron took advantage of the era's unstable space-time to connect to other eras to summon Rin Tohsaka. As she is compatible with Ishtar, Rin is used by the temple matron to summon the goddess, and to serve as her vessel. Unbeknownst to Ishtar though, Ereshkigal is summoned when she is summoned, and killed the temple matron. She also gained control of Ishtar's vessel when the latter is asleep. . Ishtar would go on to protect the ranchers in the northeast from the Demonic Beasts. However, she would demand their jewels as compensation for protecting them while also harassing Uruk.

In the south, Quetzalcoatl and Jaguar Man are also summoned by the Grail's influence. They soon took control of Ur and Eridu where Quetzalcoatl placed her Noble Phantasm, Piedra Del Sol, at the altar of a temple she had built to increase her Divinity in Sumer. Both cities are soon surrounded by a jungle that prevents Demonic Beasts from entering. However Quetzalcoatl bans the people of Ur from leaving to get help elsewhere, and those who break that rule will be killed by the jungle. She also has them send one man a day to Eridu under the pretense that they're sacrifices to satisfy her. In reality though, she is training the men of Ur to be part of her army.

Eventually, Kingu convinces Gorgon, Quetzalcoatl, and Ereshkigal to become a three-joint alliance that'll become known as the Three Goddess Alliance. Each member is bound by a rule that prevents them from taking hostile action against each other, which also includes revealing their True Names. Any violation of the rule results in the goddess who broke it in being destroyed. . While the Alliance's main goal is humanity's extinction, they're also competing with each other to see who can destroy Uruk and obtain the Greater Grail of Uruk first. Each member use their own methods to complete their supposedly common goal; Gorgon would use her Demonic Beasts; Quetzalcoatl would personally kill one hundred humans a day; Ereshkigal would use her gallû spirits to take people's souls, resulting in the death of Kutha's population. . However, Quetzalcoatl and Ereshkigal have their own reasons that they joined the Alliance that don't align with it's goal unlike Gorgon. Quetzalcoatl joined to stop the other members by getting to the Grail of Uruk first, and she wanted humanity to truly hate Gorgon so they'll fight with all their strength. Ereshkigal joined the Alliance to protect as many souls as she can in the underworld out of her love for humans. The Alliance would ho on to destroy cities, forcing many to flee to Uruk.

After the era became a Singularity, Gilgamesh summoned Merlin whose imprisonment in Avalon normally makes him impossible to summoned as a Servant. However since era exist before his death, he is technically dead, and thus able to summoned with Gilgamesh's tremendous magical energy. The appearance of the Beasts was also major factor in his manifestation alongside King Hassan. After summoning Merlin, Gilgamesh summons Ushiwakmaru, Musashibou Benkei, Leonidas, Amakusa Shirou, Fuuma Kotarou, Ibaraki-douji, and Tomeo Gozen, incarnating them through his own magical energy. Leonidas commands the efforts against the Demonic Beasts, and trains both the soldiers of Uruk and the Northern Wall to be a self-sufficient force. The other Servants summoned by Gilgamesh also help defend Uruk, though Ibaraki would eventually defect. Shirou and Kotarou would perish alongside the scouting parties Gilgamesh sent to investigate the jungle surrounding Ur and Eridu. . Tomoe would die killing Girtablilu, the general of the Demonic Beasts. Merlin would eventually encounter Medusa in the Cedar Forest, and tricked her into a contract that sealed her Divinity until she's truly ready to face Gorgon. Half a year later before Chaldea arrived, Uruk became a fortress city, and its people were able to survive for half a year thanks to their resolve and Gilgamesh's preparations. By the time Chaldea arrives, the Alliance has eliminated roughly 80% of the population, and conquered 60% of Mesopotamia.

History
Unlike their previous rayshifts, Ritsuka Fujimaru and Mash Kyrielight arrive in the era falling from the sky. Fortunately, Ritsuka grabs onto Mash, and she deploys Lord Camelot to soften their landing. Romani Archaman answers the reason they were rayshifted into mid-air was because it was tampered with. He explains the coordinates of the Rayshift were set for the largest city of the era, but they shifted after the Rayshift was established. Ritsuka and Romani disagree with Mash's speculation that Solomon is responsible, believing some power in the city is responsible. Leonardo da Vinci explains that tampering of the Rayshift was caused a defensive Bounded Field surrounding. Concerned about Uruk given the barrier, Romani orders Ritsuka and Mash to reassess the situation there. He is unable to give them coordinates though, as the era's mana concentration is overwhelming Chaldea's instruments. Using the video feed, he confirms the Band of Light in the sky, and the pair are currently in a ruined town. Give the high mana concentration, he check Ritsuka's condition when Mash detects an odd magical energy signature approaching. Romani confirms it as an hostile, apologizing it took longer to confirm since the signature pattern is new. Slaying the Demonic Beasts with minor injuries, Mash describes them as if looking to be from a completely different ecosystem. She continues that unlike ones who disappeared from the world when the Age of Gods concluded, these Demonic Beasts seemed otherworldly. Romani believes they differ from the usual Demonic Beasts in the Age of Gods, but they don't match any data on those from the era. Mash tells him the Demonic Beasts weren't trying to kill her and Ritsuka out of a bestial instinct to feed, but solely to kill them. Romani realizes the Demonic Beasts were responsible for the ruins, so he orders to leave the pair immediately. Suddenly, a girl crash lands on Ritsuka, and she almost immediately prepares to fight. Mash explains to her that she and Ritsuka only arrived in the era less than an hour age, and that they're from Chaldea, sent to correct the Singularity. The girl decides to accept her words, believing Mash and Ritsuka to be just ignorant barbarians. Romani introduces everyone, and he asks for her name. The girl refuses to give her name, citing Romani to be unworthy. She tells him and Ritsuka to forget what happened earlier, saying she'll spare Ritsuka's life if they do. Though refuses to tell them about the era, the girl asks them if they saw something precious on the ground. They try to ask what is, but she refuses to say. Suddenly though, another pack of Demonic Beasts attacks, and the girl joins the pair in the fight. After they're slain, the girl tells Ritsuka to either return to Chaldea or die if they struggle against the Demonic Beasts. She then leaves saying she doesn't intend to help the weak. Romani orders Ritsuka and Mash to head east since there are fewer Demonic Beasts that way. The pair breakthrough another pack of Demonic Beasts, but more of them continue to appear. A person then suddenly appears and easily wipes out a large number of Demonic Beasts. They introduce themselves as Enkidu, and helps Ritsuka and Mash to kill the remaining Demonic Beasts. Enkidu warns the pair they need to leave quickly, as the scent of blood will attract more Demonic Beasts. After explaining their origins and nature, Enkidu confirms to Romani that they know about the Holy Grail, the Singularities, and the Incineration of Humanity from the temple matron of Uruk's prophecy. It is because of the matron's prophecy that they came to help Ritsuka and Mash. They tell Mash that the people of the era are actively fighting against their destruction. Enkidu then guides the pair out of town to Uruk by taking a longer route to avoid Demonic Beasts.

Slaying Demonic Beasts along the way, the group eventually get past the ruins. Romani finds odd it though they're heading north, instead of south where Uruk is. Enkidu explains they would a different goddess' territory if they headed down south. Realizes the other don't understand what they meant, Enkidu explains roughly 80% of Mesopotamia's population have been killed. They continue that the Three Goddess Alliance descended on the era, and claimed 60% of Mesopotamia's territories. After Mash tells them about the Divine Spirit Servants in Chaldea, Enkidu says the goddesses of the Alliance possess Spirit Origins are equal to those of true gods, unlike the Divine Spirits at Chaldea. They then state the Demonic Beasts are like the children of one of the goddesses. They explain the Three Goddess Alliance is, as the name suggests, an alliance of three goddesses, but the only their objective is clear: humanity's extinction. Each of the three goddesses are each using their own methods to destroy Mesopotamia. The greatest of the three, the "Goddess of Demonic Beasts" from Greece, is responsible for the Demonic Beasts. Reaching an plateau, Enkidu shows Ritsuka and Mash the massive horde of Demonic Beasts attacking the Northern Wall, built by dismantling Babylonia. Mash confirms to Romani that soldiers outside the wall are holding their own against the Demonic Beasts. Enkidu says the soldiers have been holding the wall for six months, fighting against the Demonic Beasts day and night. The humans utilize their army precisely, change shifts seamlessly, train new soldiers during combat, and have their wounded rest and heal. Citing it as the ultimate in point defense, Enkidu says the humans should hold the front for another month. Romani then orders Ritsuka to request an audience with Uruk's king, explain their objective, and find and recover the Grail. Seeing they were attacked by Demonic Beasts earlier, Enkidu takes Ritsuka and Mash into the Cedar Forest.

Inside the Cedar Forest, Ritsuka, Mash, and Romani find it strange that Enkidu is leading them further from Uruk. Enkidu explains they're heading towards a wharf, where they'll take a boat downstream. The group then meet a man accompanied by a young girl who has been wandering for three day straight. Ritsuka and Mash introduce themselves, but when Enkidu is introduced, the man points out Gilgamesh recently returned from his quest for the herb of immortality. The group realize the Enkidu they've been travelling with is a fake. The fake Enkidu realizing their ruse has been discovered, goes to kill Ritsuka and Mash. With help of the young girl named Ana, Ritsuka and Mash fight the fake Enkidu. In the midst of their fight, the man traps them in an illusion of the forest. In reality, Ana lures the fake Enkidu out the forest. After cancelling the illusion, the man reveals the fake Enkidu is working directly for Solomon. He says the fake Enkidu has been calling themselves Enkidu as they wipe out entire cities. When Ana returns from luring the fake Enkidu, she casually reveals the man to be Merlin. Merlin introduces himself and Ana, saying they're both Servants. Romani interrupts Merlin to ask him how he can be a Servant since he shouldn't die until the world ends. Mash explains Merlin's role as King Arthur's adviser and court mage, and how he escaped to Avalon and trapped himself in a tower to repent for his sins. Since both Avalon and the tower exist outside of time, Merlin cannot die and become a Heroic Spirit until the world ends. Merlin confirms Da Vinci's speculation that he had been secretly using a replenishing method similar to Rayshift to kindle Chaldea's reactor, The Fire of Prometheus. Given Enkidu's betrayal though, Da Vinci demands to know the reason and method that Merlin can be a Heroic Spirit. Merlin doesn't reveal the exact the reason, but it is related to the Singularity. He then explains that since Singularity manifested in an age before his birth, he is technically dead. Using that fact, he made himself into a Servant, and part of it was that he was summoned by a strong summoner. He reveals he is now serving as the court mage of said summoner, and Ana is a Rogue Servant summoned by the Grail's influence. He met her two days ago while lost in a forest, and they made a contract to support their goals; Ana refutes he tricked her. After joining Ritsuka and Mash, he helps them to slay a pack of wyverns. The group head to Uruk after Ritsuka convinces her with come with them.

A day after leaving the forest, the group will reach Uruk in another day. Merlin explains Northern Mesopotamia belongs to the Demonic Beasts, while the south has become a mysterious jungle that no one returns from. Romani states the Alliance has devastated many cities, causing many people to flee to Uruk for safety. Merlin warns that it is uncertain what happen to humanity if the Demonic Beasts destroy the first dynasty of Sumer with Uruk and the blueprint of city-states with it. He also says Egypt's first dynasty was flourishing during the period, but they alone cannot preserve the Foundation of Humanity. He states the group need to first, recover the Grail Solomon sent to the era, and then defeat the Alliance if possible. He reveals he knows the True Name of the one of the goddesses; the goddess controlling the Demonic Beasts is up north; another goddess resides in the jungles in the south; also another goddess is soaring through the sky. Merlin cites the northern goddess as the biggest threat, but the soaring goddess is possibly more troublesome than the northern goddess. He then confirms to Romani that Gilgamesh is currently ruling Uruk. As the others discuss Gilgamesh's legend, Ana warns them of approaching Demonic Beasts. After slaying the beasts, the group eventually reach the gates of Uruk. A soldier at the gate demands to which city Ritsuka and Mash from. Merlin answers they're from Girsu, and wants to evacute them into Uruk. Seeing Merlin carries Siduri's seal, the soldier allows the group to pass. After explaining how the city handles refugees, he welcomes the group to Uruk. After Ana is given some candy, the group finally enter Uruk to find it bustling.

Heading straight to the ziggurat, the group see Gilgamesh directing the efforts against the Demonic Beasts, as various soldiers and priests report to him. Merlin forcibly bring Ritsuka to him, and reports he didn't return with the. Siduri chastises him for his failure, and asks to know who Ritsuka and Mash are. Gilgamesh dismisses her concern, having decided to fight Ritsuka and Mash. He also orders Merlin to not interfere. Asked by Merlin, Ana assist the pair in their fight. Halfway through the battle, Gilgamesh begins to hold back. After the battle ends, he decides Ritsuka and Mash aren't worth his time, and orders them to leave. Siduri wonders if the pair are the strangers that Gilgamesh spoke of. Gilgamesh believes they probably are since Merlin brought them, but says it far too soon. Merlin reveals to Ritsuka and Mash that he didn't tell Gilgamesh anything about Servants or Chaldea's mission. Romani tells Ritsuka to try to explain things to Gilgamesh, but Gilgamesh says that isn't necessary. He reveals he knows about Heroic Spirit summoning, and aware he will become a Heroic Spirit. Mash tell him they need to quickly find the Grail to prevent the Singularity from destroying humanity. Gilgamesh reveals he already possesses the Grail, but outright refuses to give to Chaldea. Ritsuka asks if he'll give it in exchange for defeating the Alliance. Gilgamesh laughs them off, and then states he doesn't help from Chaldea. A soldier then brings a message from the observation post near the that Ishtar, a member of the Alliance, is speeding towards Uruk. Suddenly, Ishtar, the girl Ritsuka and Mash met when they arrived in the era, bursts down through the roof. She decides to kill Gilgamesh for insulting her, and Ritsuka to stop any rumors of their first encounter from coming out. Amused by this, Gilgamesh allows the group to fight alongside him. After the fight, Ishtar decides to destroy the ziggurart allow with Gilgamesh, but she stops when she sees Ana. After Ishtar leaves, Gilgamesh and Siduri return to work. Merlin suggest to the others they find a place for the night, and talk to Gilgamesh tomorrow. Gilgamesh however asserts he doesn't need their help, stating any diaster caused in the era will be solved by its people. He states Chaldea will be called if they needed, and reveals he summoned Merlin. Merlin confirms such, and explains how Gilgamesh became a mage to protect Mesopotamia. He also explains summoning is easier in the Age of Gods than in the modern age when Gilgamesh states he performs real Heroic Spirit summoning unlike Chaldea's Fate system. Nonetheless he commends Chaldea for developing the system, and for removing the six previous Singularities. Regardless of their achievements though, he again assert that they're needed. He then gives Siduri charge of the group after saying they should work hard if they want to assist him. Outside the ziggurat, Siduri introduces herself, and suggests the group help various jobs in Uruk to prove their worth to Gilgamesh. Stating she'll make the proper job arrangements, she leads the group to lodgings. Before that though, Mash asks her why she help them, to which Siduri replies it was Gilgamesh's command.

Siduri leads the group their new lodgings, an old tavern, which Mash dubs the Chaldean Embassy. Merlin goes to pick his room on the second floor; Ana follows him to keep him making mischief. After half a day of cleaning, the group eats with Siduri and Gilgamesh's Servants: Ushiwakamaru, Musashibou Benkei, and Leonidas. Romani explain Ushiwakamaru and Benkei slay the Demonic Beasts around Uruk, and Leonidas commands the soldiers against the Demonic Beasts. Ushiwakamaru says that she and the others were summoned by Gilgamesh, they know nothing about Chaldea. She warns they would side with Gilgamesh against Chaldea if ever forced to choose. But she agrees their mission to save the era and defend Uruk is the same as Chaldea's. Romani asks if Gilgamesh is one only providing magical energy to his Servants. After confirming such, Benkei explains that after Gilgamesh summoned Merlin, he summoned seven Heroic Spirits. However of the seven summoned, only four are remaining. He continues that Gilgamesh formed their Spirit Origins with his own magical energy during the summoning. Essentially incarnated, they can eat and sleep like humans, and generate their own magical energy. Merlin explains how Gilgamesh summoned seven more Heroic Spirits despite being nearly drained by summoning him. He also says the reason Gilgamesh isn't fighting on the front lines is partially because he hasn't yet recovered his magical energy. Leondias states how Gilgamesh foresaw a future where Uruk was destroyed and swallowed into an abyss when the Demonic Beasts destroyed the northern cities and Kutha vanished overnight. After the era became a Singularity, he summoned seven Heroic Spirits, and half a year later, turned Uruk into a fortress city. The people grow crops, train soldiers, and build structures all while fighting against an unknown enemy. When Ritsuka mentions the Fake Enkidu, Mash wonder if Gilgamesh knows about them. Merlin confirms he does, but since he never met them personally since he never leaves the ziggurat. Merlin tells Ritsuka to get some rest for tomorrow. He explains he has something he's investigating, so Ritsuka and Mash will need to get help from Siduri and the other Servants while he's gone. After Merlin leaves, Ritsuka and Mash go to sleep.

Over the next several days, Ritsuka, Mash, and Ana are tasked by Siduri with various tasks. The first is to help a rancher out in Uruk's outskirts shear his sleep, but they ended up defending him from Demonic Beasts. After slaying the Demonic Beasts, the group bring the remaining sheep to the Sacred Temple.

The second task calls for the group, joined by Ushiwakamaru and Benkei, to investigate into the possible affair of the armorer's wife, while Ana helps with the flower shop. The investigation leads the group with discovering and stopping a plot by an underground species, one of whom is the armorer's wife, to invade the surface. Afterwards, Ushiwakamaru explains how Uruk is under constant threat from the Demonics Beast from the north, the jungle in the south, and Ishtar in the northeast. While Leonidas commands the efforts agains the Demonic Beasts, Ishtar is unpredictable, and nothing is yet known about the jungle. Benkei explains how Gilgamesh previously sent scouting parties to investigate the jungle, but none of them ever returned. When Romani mentions the Alliance is after Gilgamesh's grail, Ushiwakamaru wonders if they want to use it to re-create the world in their image after destroying Uruk. However, Romani notices Ushiwakamaru said Gilgamesh called his Grail, The Greater Grail of Uruk. He then confirms Ritsuka's speculation that the Grail held by Gilgamesh is his own, and not Solomon's. Now realizing the Grail they seek isn't in Uruk, Ritsuka wonders if one of Alliance members has it.

The next day, the group is tasked with performing a mock battle with Leonidas and a hundred of his trainees. After the battle, Leondias gives a lecture to soldiers, which Mash quickly joins. As the lecture continues, Ana reveals she suddenly woke up in the Cedar Forest in her current body, and with no knowledge about being a Servant. She then went on to kill several Demonic Beasts, and used their souls to maintain herself. She refuses Ritsuka's offer to contract with them, stating she is only with them because of her hostilities with the Alliance.

After twenty days, Ritsuka and Mash help Ana with the problem she is investigated. Taken to a cave underneath Uruk, the group defeat the spirits residing there. After they return, Ana explains the spirits were likely responsible for people falling into an eternal slumber by taking their souls. She continues the soul can be returned to its body as long as its preserved, but the body will perish if the soul is destroyed before reaching. After Mash goes with Ana to report to Siduri, Ritsuka meets a seemingly crippled old man. They give the old man some bread, but they're stopped by him. He warns Ritsuka that pity can be at times itself a crime if void of purpose, as it is with shame. He commends Ritsuka for giving what he needed, instead of just money, and introduces himself as. Ziusudra then gives Ritsuka three warnings; Empathize not with the hateful; Celebrate not with the joyous one; extol not the pained one.

Ritsuka has dream where a voice speaks of mankind's sins, evils that only affect them. The oldest of these is the Original Sin II, the sin of parting from ■, and leaving paraside. The voice continues that life was born from, the goddess of the beginning, who to humans is the sea itself. It claims the roaring of the waves became a voice to expose mankind's sins. It tries to say the name of this voice, but it begins to cry ending the dream.

Recognizing the group's recent achievements, Gilgamesh gives them a task, which further will come from Merlin. Outside the ziggurat, Merlin explains they will be heading to in the south to investigate the jungle. Ushiwakamaru commends the group for finally being entrusted with an order by Gilgamesh. Before Benkei departs to help Leonidas, he and Ushiwakamaru do a praticle battle with group to congratulate them. After the battle, Ushiwakamaru and Benkei commend the group for their skills. He warns them though that two Heroic Spirits summoned by Gilgamesh, Amakusa Shirou and Fuuma Kotarou, also never returned from the jungle. He states how Ibaraki-douji defected from Uruk and fled somewthere, while Tomoe Gozen perished killing, the general of the Demonic Beasts. After thanking Ushiwakamaru and Benkei, the group leave Uruk.

As the group fight through Demonic Beasts on their way to Ur, Ana is concerned about the increasing number of Demonic Beasts from the north. Merlin is worried people will start claiming the Goddess of Demonic Beasts is the same as Tiamat. After explaining Tiamat's legend, Romani explain how she possessed an Authority called Potnia Theron, which allows the creation of infinite amount of monsters, provided they have the resources. Based on the number of Demonic Beasts, he believes the northern goddess possesses the same Authority. Merlin agree that due to that people of Uruk see her as Tiamat, especially since the Demonic Beasts are all Tiamat's offspring. Since the northern goddess is the great threat to Uruk, Romani wonders if Gilgamesh has a plan, especially if she is Tiamat. Merlin tells him to focus on the south for now, and the group will be at Ur once they cross the.

Entering the jungle, the group complain about its heat, density, and the abundance of critters; Mash compares it to those when dinosaurs existed. Merlin states its ether is dense than Britain, and that it's on par with a Reality Marble. Romani is unable to get any readings since Chaldea's instruments are unstable. Da Vinci compares the jungle to Egypt, calling it a different world, or its mythological system is different. She tells the group to rely on their sense, especially sight and smell, to navigate the jungle, as she's unable to use Sheba to discern anything there. Mash says the group that Ur is a kilometer south, and they'll arrive there in twenty minutes. Suddenly, an unseen person mocks the group, as they move at high speeds above the trees. The person show themselves to be a strange woman wearing tiger pajamas when she fell down. She introduces herself as Jaguar Man, and the group fight her. After the fight ends, Jaguar Man retreats, but they decide not to pursue since too powerful for them. Instead they continue onto Ur.

Entering Ur, Merlin tells a woman there that he and the others were ordered by Gilgamesh to investigate Ur. The woman says Ur is safe, as the surrounding jungle prevents the Demonic Beasts from entering. Merlin asks if she thought isolating themselves in Ur was the best course of action. the woman answers that they tried to send help to Uruk, but it was violation of the jungle goddess' rules. Merlin realizes the people of Ur are safe, but they're banned from leaving; anyone coming to help, or leaving to help, is killed by the jungle. He then asks the woman how many have been sacrifice, guessing it's one a day. The woman tries to deny it, but Merlin points out the lack of males in the city. Since Ur isn't at war, he deduces the males were sacrificed. The woman says the sacrifices were necessary as everyone agreed, and they must offer one a day to to satisfy the goddess. Due to Mash's rebuking the woman, the rest of the people retreat into their home out of guilt. Jaguar Warrior then appears and fights the group so they can take them outside. However, she is far too fast and powerful for them, as Merlin realizes she is a Divine Spirit. He implores the others to retreat since they completed their investigation of Ur. Jaguar Man catches up to the group several times as they escaped the jungle, but Ana drove her off each time. Upon returning to Uruk, they report their finding to Gilgamesh. He asks Merlin if he could see Eridu from Ur, asking if the axe is still there. Merlin answer he couldn't see Eridu due to the jungle's density, but he did sense a powerful divinity, so he assumes the axe is still in Eridu.

The next morning, Gilgamesh enters the Chaldean Embassy to everyone's surprise. He orders them to look into Uruk's water supply, which south of the city, towards the Persian Gulf. An observatory has been constructed, with ten days' worth of jars made to automatically gather seawater. The group's assignment is to deliver the empty jars in the wagon and return with the jars at the observatory. Gilgamesh says the route to the Persian Gulf is the only area the Alliance hasn't attacked. He continues Merlin and Ana will not be going with Ritsuka and Mash, as he only had two travel permits to the gulf.

Joined by Gilgamesh, Ritsuka and Mash travel to the Persian Gulf. After destroying stone colossi, the group arrive at the observatory. While Gilgamesh checks something at the observatory, Ritsuka and Mash exchange the jars. Since Gilgamesh won't be back in twenty minutes the pair take the time to rest. However, Mash sees something in the sky travelling at 500 kph with mana concentration of the Age of the Gods towards her. She blocks it with her shield, and it turns out to be the fake Enkidu. The fake Enkidu goes to kill Ritsuka and Mash since they believe them to be alone, and Ishtar isn't around to protect the gulf. The pair struggle against the fake Enkidu, but Gilgamesh arrives to counter their attacks. At first, Gilgamesh treats the fake Enkidu similar to the original, but Mash tells him they're an impostor. He then points they may be stronger than the original, and surmises they were gifted with an immensely powerful magical reactor core by the Alliance. The fake Enkidu, strained by Gilgamesh's presence, retreats towards norther Uruk, saying they'll end the world along with him. The fake Enkidu is strained by Gilgamesh's presence. and they retreat towards northern Uruk, saying they'll end the world along with him. Since he's accomplished what he needed to do, Gilgamesh returns to Uruk with Ritsuka and Mash. Meanwhile, the fake Enkidu questions why they retreated at the sight of Gilgamesh. Though they want to speak with him, they nonetheless vow to kill him for Mother.

The next day at the ziggurat, Gilgamesh orders Ritsuka, Mash, and Merlin to go to and retrieve the Tablet of Destinies. He explains he foresaw the future in Kutha when he was travelling back to Uruk from the underworld. He recorded what he foresaw on a clay tablet, and left it at Kutha. However, he doesn't remember what future he recorded as he did it subconsciously. He also tells the group to gather information from the few ranches on the way to Kutha about Ishtar, who's been blamed for damaging the ranches. When Ritsuka asks if Kutha is under Ishtar's influence, Siduri answers that Ishtar controls the skies above northeastern Uruk. After Gilgamesh permits them to leave through Uruk's north, the group hurry to the embassy. Mash tells Ana will be coming with her and the others to help retrieve the Tablet of Destinies from Kutha. She explains the trip will take two days, and they have one day to search the city. As the group get ready, Ushiwakamaru warns them that while Kutha is under Ishtar's control, it is also near the Goddess of Demonic Beasts' territory. She implores to be careful on their journey as they'll likely encounter many powerful Demonic Beasts. Outside the embassy, Merlin tells the others that Kutha's populace disappeared when the Alliance was formed. An expedition party sent there saw that none of the corpses had wounds on them.

As they travel to Kutha, the group gather testimonies from ranchers about Ishtar. From their testimonies the group learn Ishtar has been attacking and extorting the ranchers. Responding to the other's confusion on her greed, Merlin reveals she isn't the normal Ishtar. He explains when the Demonic Beasts appeared in the north, the Sacred Temple tried to summon Ishtar without Gilgamesh's knowledge. Foreseeing the era would turn into a Singularity, they took advantage of the instability of space-time. As Gilgamesh built the Northern Wall, the temple matron summoned a human compatible with Ishtar to summon her. Merlin points Mesopotamian gods are blond while humans have black hair, therefore the current Ishtar is the girl serving as her vessel. Ana alerts the others to approaching Demonic Beasts, so they slay them before moving on to Kutha.

When the group arrive in Kutha, Romani reports none of the Demonic Beasts aren't trying to enter the city. Merlin says the situation in the city is fundamentally different from other cities, something he and Gilgamesh had overlooked. He feels Gilgamesh left the Tablet in the city for a reason. He then tells the group to split up to search for the Tablet; Mash to the east; him to the north; Ana to the west; Ritsuka to the south. Mash refuses to leave Ritsuka alone, but Merlin assures her they'll be safe. After ten minutes of searching, Ritsuka suddenly find themselves trapped in a cage underground surrounded by gallû spirits. Ziusudra appears to drive them off, and explains Ritsuka is in the underworld, which lies underneath Kutha. He then expels Ritsuka back to the living world with a message to give Merlin: "All is well in the underworld". When they return, Ritsuka is found by the others, returning from their search, sitting on the tablet. Ritsuka tells Merlin that they were underground, and they were rescued by Ziusudra. Merlin asks Romani for his records on Ritsuka, but Romani says he has no record for the past few minutes, as if Ritsuka was dead. Romani then explains to Ritsuka that Ziusudra is the name of the survivor of the flood that eradicated mankind, the one who foresaw the end of the world and became the Guardian of the Abyss. He doesn't believe the Ziusudra Ritsuka met isn't the actual one, but considers the possibility he's real with Ishtar and Enkidu's appearances. Merlin wonders if someone is taking the role of Ziusudra, though none claim that name on a whim. Contemplating Ziusudra's message, he understands the Queen of Kur has also materializes. He realizes the true identity of three goddesses he saw through his clairvoyance. But Romani interrupts him to warn everyone that Ishtar is approaching. Ishtar attacks the group for questioning the ranchers about her activities. She claims she never extorted the ranchers, but she did demand compensation for protecting them. The group then fight her, but she flies away whenever they gain the upper hand. Ishtar suddenly gets drowsy, which Ana takes advantage of to jump up and knock her down. The impact knocks Ishtar unconscious, so the group tie her up.

Ishtar wakes up later that night, and becomes terrified by Fou, recognizing him as a Beast of Calamity. Merlin explains to her the rope is woven from lapis lazuli and the hides of Demonic Beasts, which even she'll need a moment to break, plenty of time for Ana to kill her. Mash asks Ishtar for the reason the goddesses attack Uruk, for their True Names, and who summoned her. Ishtar answers the reason the goddesses is attacking Uruk is because they wish to control the world. She wants to rule humans while the northern goddess want to rule the world. The goddesses are thus competing with each other to see who can destroy Uruk first and obtain Gilgamesh's Grail. Once one of the goddesses obtains the Grail to control the world, the other two will either leave, or remain to serve as subservient deities. Ritsuka asks Ishtar for the other goddesses' True Names, but she refuses to do so since it would violated the alliance's pact to not attack each other. She confirms she was summoned by the Sacred Temple, but the northern and southern goddesses were summoned by the Grail. Suddenly the group are surrounded by skeletons from all over the city, larger than the population of Kutha. They decide to retreat from Kutha before they're overwhelmed by the skeleton since they have the Tablet. As they breakthrough the skeletons, Merlin realizes the skeletons aren't just Kutha's population, but also those who died in the past. The overwhelming amount of undead blocks the group's path out of the city. Fortunately Ishtar, freed by Ritsuka earlier, destroys a large number of the undead, then flies off to the northeast. The group take this chance to finally escape Kutha.

The group return to Uruk, and report what happened in Kutha to Gilgamesh. Gilgamesh tells them of Nippur, whose population has survived by isolated themselves in its wall while under constant siege from Demonic Beasts. He has evacuated the citizens in between the beasts' attack cycles, but now their supplies are depleted. Thus he decides any survivors of Nippur need to be evacuated immediately. He tells the group to use the break in the beasts' seven day attack cycle to lead Nippur's survivors to the Northern Wall. He then tells Ritsuka to read the Tablet since they're the ones who obtained. Ritsuka says they can't read it, but Gilgamesh tells them they only need to lay their hands on the Tablet and say: "Ur na-nam, ur na-nam. Dur-an-ki, gir-edin." Ritsuka follows Gilgamesh's instructions, and granted a vision.

A voice in the vision speaks of a king who ignored the world's suffering while smiling. Unable to forgive him, it then speaks of how the history of mankind is a cycle of suffering. The voice pities humans as imperfect beings who live in their contradictions, but it forgives them if they're commoners. However, an almighty king with the power and means to set humanity's imperfectness right is a different matter. The voice speaks of a king with eyes that could see into the past and the future. The king also saw the world's suffering but he merely laughed despite his enlightenment. Unable to forgive the king for ignoring mankind's suffering, the voice inscribed their message, so future generations would know their rage and follow in their footsteps. It instructs its followers to construct a temple and build a band of light, stating they're all resources and time to destroy this king and forget his indifference. It then reveals Solomon resides in the final Singularity, a plane named after him.

After Ritsuka returns from the vision, Gilgamesh reveals it is what he foresaw after returning from the Abyss, and it's one of few clues to finding Solomon's precise location. The group then proceed to leave for Nippur.

The group arrive at Northern Wall to find it just as bustling as Uruk, but Demonic Beasts able to run up its walls soon attack. After slaying the beasts, they are greeted by Leonidas, Ushiwakamaru, and Benkei. Leonidas takes them to the Dingr Artillery platform, where he explains how the soldier use Gilgamesh's treasures to defend the Northern Wall. He then tells the group how he and the others lead Nippur's citizens to the Northern Wall every night. However last night the Demonic Beasts began to patrol the outskirts of Nippur, likely due to being commanded by Girtablilu's replacement. As they can't delay the rescue mission since Nippur's citizens are starving, Leonidas decide to use a diversionary tactic. While Ushiwakamaru and Benkei's unit head towards Nippur from the east to distract the Demonic Beasts, Ritsuka's group will enter the city from the west. Once inside the group will open the gate and lead the citizens out. Leonidas states they'll launch their operation tomorrow later in the evening.

Later that night Merlin expresses his concerns about tomorrow's operation while reinforcing the walls with his flowers. He then tells Ana that its wise not enter the Cedar Forest since there's no way to clear that temple. Ana wonders if she should tell the others about her situation, but Merlin tells her that may freak Ritsuka out. He points out Ana fears the others will fear and hate her when they find out her true identity as a divine being. He continues that even though he and Ana are inhuman they don't need to be mankind's enemy. He explains to Ana that he doesn't like individual humans only the patterns they weave, and trying to justify his own actions resulted him in imprisoning himself. He tells her that Ritsuka is fine without knowing her True Name, which would only reveal the name of the enemy not help them fight it. He calls her a vital point the Goddess of Demonic Beasts didn't expect, and tells to watch for the instant she'll need to throw away everything. However he convinces her to escape the situation alive while tricking her enemy.

The next day, Leonidas goes over the rescue operation. There are 200 civilians left in Nippur, the majority of whom couldn't previously be evacuated: women, the elderly, and the wounded. Leondias understands though they won't leave unless their safety is guaranteed. He and the group will protect and escort the guide, a former citizen of Nippur, to its western gate and persuade the guards to open it. Leonidas' soldiers will then the citizens lead westward to the Northern Wall while the group slay any Demonic Beasts that Ushiwakamaru and Benkei fail to distract. However he hasn't heard from the messengers used to maintain contact with Nippur for the past few days. Therefore he implores Ritsuka to withdraw immediately if they sense grave danger.

As Ushiwakamaru and Benkei fight the Demonic Beasts, the group arrive in Nippur. However they're confronted by the fake Enkidu who reveals they took the citizens to the Demonic Beasts' lair last night. They further reveal the Demonic Beasts aren't trying to kill humans, but instead taking them and using them as raw materials to create more beasts. After the group slay some Demonic Beasts, the fake Enkidu attacks Ana since she's their main target. Merlin implores Fou to heal Ana, but Fou instead teleport her and himself away. Suddenly Tiamat emerges from underground, and kills the soldiers with a single swing of her tail. She introduces herself to the group as the leader of the alliance. While they're glad to see her awake, the fake Enkidu reminds her she was supposed to rest until the Day of Rebirth. Tiamat answers she wanted to see what the fake Enkidu was doing, but she doesn't the group even worth killing. However she decides to eat them, and petrifies them with her scowl. They're unable to break free, and Romani instructs them to retreat back to the Northern Wall. However Tiamat blocks their way, so they forced to fight her. Unfortunately she regenerates too quickly for the group to actually wound her. Mash thinks its because of her Authority, but Merlin reveals it's due to her possessing Solomon's Grail. Tiamat confirms she has the Grail, but claims she is using her own power to regenerate. Ushiwakamaru then arrives to hold her back while the group retreat. However Tiamat overwhelms and breaks through Nippur's walls to pursue the group. Merlin instructs Ritsuka and Mash to run away, revealing he'll temporarily return to the world of dreams if he's killed. However Titamat uses her Mystic Eyes of Petrification, so Merlin implores the others to defend him. Ritsuka and Mash are unable to defeat her, but Leonidas arrives and uses Thermopylae Enomotia to defend them. While he was able to defend against Tiamat's heat way, he couldn't avert its petrifying effects. Before he completely turns to stone thought, he reveals the so-called Tiamat to be Gorgon/. Gorgon then prepares to advance to toward Uruk with the Demonic Beasts to destroy it. She is stopped however when the fake Enkidu reminds her to wait for the birth of 100,000 Demonic Beasts in the Blood Fort before destroying Uruk. Gorgon decides to return to the Blood Fort, but warns she'll return to destroy Uruk in ten days. After she leaves, the fake Enkidu reveals they're the prototype of a new generation of humanity to replace the humans that abandoned Tiamat. They then reveal themselves to be Kingu, though not the original instead a new human designed after Enkidu. Kingu states they're the beginning of a new humanity who'll continue the old humanity's history once they're eradicated. After Kingu leaves, Ritsuka and Mash return to the Northern Wall. There Benkei decides to abandon the Northern Wall since he blames himself for Ushiwakamura's supposed death, and head towards the ruins of Nippur. Yet despite Leonidas' death, the soldiers of the Northern Wall continue their tasks as he had instructed. Merlin decides to regroup with Ana and Fou, then report back to Gilgamesh.

Meanwhile Ushiwakamaru is revealed to be alive, imprisoned in the Blood Fort. She is then confronted by Kingu who reveals they use the temple to turn humans into Demonic Beasts. Kingu prepares to turn Ushiwakamaru into one, but she asks them why they let the children escape. They explain the children aren't a threat unlike the soldiers. Ushiwakamaru however counters Kingu saved a child earlier because they cried out for help. Kingu then decides to take her to Tiamat, whose Authority is the sea of life. It is a black mud that corrupts any human including Servants into becoming children of Tiamat. It is also called the Primordial life, the sea of chaos, the mud of the Holy Grail by mage, and the Chaos Tide by Solomon.

Returning to Uruk, the group report to Gilgamesh on transpired the previous day. In answer to Gilgamesh's concerns, Merlin ponders if Gorgon is the Singularity because of Solomon's Grail or another reason. Regardless of the reason, her former appearance and power were restored by the Grail. Merlin points out though none of Gorgon's legends depict as a mother of monsters, therefore she was granted Potnia Theron by the Grail. Mash then tells Gilgamesh that Gorgon only considers the other goddesses threats. This prompts Gilgamesh to conceive a plan to have the group to persuade Ishtar into contracting with Ritsuka, so he can use her Gugalanna.

On Gilgamesh's orders, the group travel to Mt. Ebih where Ishtar built herself a temple. After slaying some Demonic Beasts, they eventually reach the mountain. As they travel up the path to the summit, they're fight demonic statues placed by Ishtar to guard the mountain. After destroying them, the group soon make it to Ishtar's temple. However, Ishtar refuses to talk and attacks them. As the fight progresses, the group stop her to bribe with the gems Gilgamesh provided them to ally with them. Ritsuka adds that she'll also receive 25% of Gilgamesh's treasury. Romani eventually convinces her by saying if humanity is incinerated then they will be no one to admire her beauty. After making a temporary contract with Ritsuka, Ishtar leaves her temple with the rest. She explains to the group that the temple matron was able to summon her vessel from another era due to the era being connected with other eras as a result of becoming a Singularity. She also says the matron died from draining all of her magical energy. In answer to Romani's question, Ishtar explains she and her vessel are essentially fused, with er being the majority. She continues that when a Divine Spirit and a human become a Pseudo-Servant, the Divine Spirit is the main personality since they possess more spiritrons. Suddenly the group are attacked by mountain spirits seeking vengeance on Ishtar.

After defeating the spirits, the group descend down the mountain by nightfall. They find an abandoned house, and while the others there Ritsuka takes first watch. Later, as it nears dawn, Ishtar talks with Ritsuka. While talking to them, she sneezes and her appearance changes to her own but with blonde hair. Unaware of the change, she asks Ritsuka for their opinion on the Alliance. She says it's impossible to negotiate with Gorgon, and she doesn't understand the southern goddess since they're from differing cultures. She continues that she won't forgive humans for overturning the rule of the gods. She believes living in the Age of the Gods is easier for humans as they can blame all their misfortunes on the gods. She then reveals she joined the Alliance to make a world for both gods and humans. After saying she is only an enemy of humanity's world, Ishtar goes to bed.

Returning to Uruk, Gilgamesh congratulates the group on their success. He tells them that 's axe, which they can use against Gorgon, is in Eridu. He asks Ishtar to tell him the identity of the southern goddess. She answers that the southern goddess is Quetzalcoatl. In answer to Romani's confusion about Quetzalcoatl not being male, she reveals the gods of Mesoamerica originated from an asteroid that collided with earth. The asteroid possessed a microscopic organism that changed the local animals into gods who built the Mesoamerican civilization. The gods of Mesoamerica also possess humans to serve as their vessels. Gilgamesh then orders Romani to gather information on Quetzalcoatl. Suddenly though, a soldier rushes in and reveals the south gate has been destroyed. Gilgamesh believes the attack is from Demonic Beasts, but the soldier reveals the attacker is Quetzcoatl whose heading straight for the ziggurat.

Outside at the southern market, soldiers try to fight Quetzcoatl, but she easily kills them. The group arrive just in time to see a soldier about to killed by her, but Ana saves him. Quetzcoatl then manipulates the wind to launch another soldier high into the air. Fortunately Ana uses her chain to save him before he falls to his death. After the soldier retreats, Quetzcoatl decides to fight the group, but their attacks are ineffective. She confirms she is part of the Alliance, and reveals she was summoned Mother to destroy humanity. But she refuses to use her Authority to destroy them instead opting to kill them one by one, with a limit of one hundred people a day. She then rides a pterosaur back to the jungle after warning she'll return tomorrow. The group then witness Jaguar Man stacking the dead soldiers onto a cargo slab. She sends a group of werejaguars to attack them before leaving.

After defeating the werejaguars, the group return to the ziggurat. Siduri states the soldiers and the craftsmen fleeing the southern market will hinder Gilgamesh's secret weapon project, but he stops her from saying more. As the group discuss how to fight Quetzcoatl, Romani surmises she is occupying the jungle covered Eridu. He assumes she built a temple dedicated to her there to increase her divinity in Sumer. Ana correctly surmises that the group will need to destroy the symbol of Quetzcoatl's power at the temple to lower her divinity. Gilgamesh then orders the group to go to Eridu to defeat Quetzcoatl and retrieve Marduk's axe. He says the trip will take a total of four days there and back. He continues they'll immediately begin preparations for the battle with Gorgon upon they're return.

Outside Uruk's south gate, Mash gives the gatekeeper the seal from Gilgamesh permitting the group's depature. The gatekeeper tells them that he was infected with the same infectious disease that has been infecting Uruk's populace for past few days. During Quetzcoatl's attack, she saw he was sick, and gave him a mango that cured his ailment once he ate it. After he pleads to the group to try talking to Quetzcoatl first, they depart for Ur.

Entering the jungle, the group discuss the possibility of negotiating with Quetzcoatl. Merlin and Ana assumes Quetzcoatl's Mother refers to Tiamat. He asks Ishtar if she and Quetzcoatl were ordered by Gorgon to eradicate humanity, but she deflects the question. Any further discussion is interrupted by the arrival of Jaguar Man who the group are forced to fight. Fortunately due to Ishtar's help, the group are able to defeat her. After being shot by Ishtar, Jaguar Man reveals herself to be a Rogue Servant. At Merlin's behest, Ritsuka easily convinces her to become an ally. She prepares to guide the group to Eridu, but werejaguars ambush them for her betrayal. Taking on a serious demeanor with modern clothing, she defeats her former minions.

Arriving at Ur, the group are shocked to see the Uruk soldiers Quetzcoatl had killed to be alive. Jaguar Man reveals Quetzcoatl revived the soldiers right after killing them. Merlin also reveals a report said outside the soldiers who were taken away, no other soldiers died in Quetzcoatl's attack. Ana correctly surmises the soldiers are forbidden from leaving Ur though. Jaguar Man says the soldiers, who are being restrained at Eridu, are to be part of Quetzcoatl's army. She also warns Ritsuka that the only way to convince Quetzcoatl would be to defeat her in a head-on battle of the soul. Later that night, Ishtar gives Ritsuka advice on how to fight Quetzcoatl.

The next day, the group guided to the jungle outside of Eridu, but Quetzcoatl has just returned from Uruk. Since her presence complicates things, Merlin asks Ritsuka if they should wait for her to go to Uruk, or wait for an opportunity to get into her temple. Ritsuka goes with the latter option, which the others agree with since there's no time to delay. Romani gives the group an overlay of Eridu, but he warns Quetzcoatl is currently at her temple. Jaguar Man says she, Mash, and Ishtar will hold her off while Ritsuka goes to destroys Piedra Del Sol at the temple's peak. She then gives them a spare of her weapon she made last night for this very purpose.

Going through the rest of the jungle, the group enter Eridu. As they gaze at the temple, waves of winged serpents attack them. They breakthrough them and reach the temple where they see Marduk's axe behind it. Quetzalcoatl greets the group, and speaks of how humans give her purpose despite the contradiction of her trying to destroy them. She explains she is helping humans adapt to their environment by helping some while killing others. It is for this purpose that she joined the Alliance. Correctly surmising the group's plan, she'll let Ritsuka to try to reach her stone while the others try to hold her off. She ask them if they feel the joy in the danger when Ritsuka realizes the joyous one Ziusudra spoke of refers to Quetzcoatl. After Ritsuka answers fighting means to give your all, Quetzcoatl fights the group. While the others hold off Quetzcoatl, Ritsuka reaches the temple's altar where Piedra Del Sol rest. Romani warns Quetzcoatl has defeated the others and is approaching the altar. He implores Ritsuka to destroy the stone, but they realize Quetzcoatl wants to see a display of human resolve. They decide to body slam her, so Ishtar takes them high into the air at Jaguar Man's suggestion. Quetzcoatl is caught off guard by Ritsuka throwing themselves from such a height, but she is able to save them at the last moment. Impressed by Ritsuka's resolve, she decides to join the group.

Due to the sheer size of Marduk's axe, Quetzcoatl proposes to tie a rope made of jungle vines to it, and have her winged serpents carry it to Uruk. She says the task will take three days, and her proposal is gladly accepted. Before she can get ready her winged serpents, the group defeat a group of spriggans guarding the axe. Afterwards, Quetzcoatl finishes the preparations to deliver the axe to Uruk. She then takes the group to see a cylinder seal in the center of Eridu before they need to return to Uruk. Merlin transcribes its inscription into the air to reveal the prophecy of Mesopotamia becoming a Singularity and Tiamat razing Uruk. The group realize Gilgamesh made preparations against the Demonic Beasts because he knew the prophecy on the seal. Thanks to his preparations and the resolve of Uruk's populace, Mesopotamia was able to stave off destruction for half a year before Chaldea arrived. Quetzcoatl then orders Jaguar Man to supervise the winged serpents carrying Marduk's axe.

Passing back through the jungle while slaying Demonic Beasts, the group reach Ur. Later that night, Ishtar tells Ritsuka that the law of the Alliance still bind her and Quetzcoatl despite their leaving. When she sees Ritsuka is unwell from fatigue, she take over their watch while listening to their stories about the Singularities. After hearing about the six main Singularities, Ishtar expresses her enjoyment about the unlimited potential of humans and adventure. Because of this she likes humans, and thus wants to protect them. She also wants to go on an adventure before she doesn't have the freedom to do so. Seeing dawn is nearing, she and Ritsuka try to get some sleep before the sun rises.

Returning to Uruk, the group learn that Gilgamesh has passed away, seemingly due to overexerting himself. However, Romani and Merlin disagree that he died in such a way. Merlin asks Siduri if anything strange happened in the city after the group left for Ur. Siduri answers there have been a number of deaths from weakness, which makes Quetzalcoatl realizes they were caused by one of the Alliance. She also reveals Ishtar isn't a member of the Alliance, and the third member is Ereshkigal. Realizing what Ziusudra's message to him meant, Merlin reveals Ereshkigal was summoned when Ishtar was summoned, and that it was Ereshkigal who killed the temple matron. He also says Ereshkigal is using Ishtar's body without her knowledge since she can't leave the underworld. Quetzalcoatl reveals Ereshkigal's gallû spirits are responsible for the deaths in Uruk, and assumes one took Gilgamesh's soul to Kur. Urged by Siduri and Merlin, the group head to Kur to rescue Gilgamesh.

At Kutha Ishtar says only she, Ritsuka, and Mash will enter Kur while Merlin and Quetzalcoatl stay behind. She explains gods have their powers nullified in Kur so they can't escape after they die. She then flies high in the air, and fires a giant hole in the ground leading into Kur. Ritsuka and Mash fall down into the underworld, followed by Ishtar entering.

Inside the underworld, Ishtar explains the narrow cages and the lights in them Mash sees are deceased human souls and soul cages. The soul cages prevents the soul from disappearing after the body dies, but they're tormented by the cold until Ereshkigal bores of them. Ishtar confirms Ereshkigal is responsible for the souls being forcibly taken from their bodies, noticing a greater number of soul cages than before. She wonders if Ereshkigal is trying to established a kingdom of the dead. She explains Ereshkigal is in her palace beyond the seven gates, trapped there as the gods had decreed. The trio then walk to the first gate, which Ishtar explains it will ask binary question that's fair and logical to test a soul's morality. There is no wrong answer, but they'll still have to complete a trial afterwards. However, the gate asks an illogical question with the answer being Ereshkigal or Ishtar. After Ritsuka gives their answer, the group are forced to fight some spirits. After defeating the spirits, the group pass through the first gate. However while Ritsuka and Mash pass through it safely, Ishtar is shocked and shrunken a little. Ereshkigal explains to her that she'll become smaller with every gate she passes through, losing 1/7 of her divinity at a time. She also tells Ritsuka that she'll accept them and Mash as visitors to Kur if they pass her trials. At the third gate, it becomes apparent that choosing an answer favoring Ereshkigal makes the following combat trial easier while choosing an answer favoring Ishtar makes it harder. The group then find Gilgamesh who explains he hid from the gallû spirits so they couldn't capture him. Since he's dead though, he cannot leave the underworld, so the group still need to defeat Ereshkigal before he can return to Uruk. After they pass through the third gate, he reveals that before Chaldea's arrival he discovered Enkidu's remains missing from their grave. This makes the others realize that Kingu's body is actually Enkidu's. After passing through the remain gates, Ishtar has shrunken to palm size. Nonetheless the group enter Ereshkigal's palace to confront her.

Inside her palace, Ereshkigal appears before the group, and changes the atmosphere to the equivalent of a mountain top. Because of that Romani implores Ritsuka to defeat her before they die from the frigid conditions. Ereshkigal then sheds her guise as a gallû spirit to reveal her true form. She believes Ritsuka should be surprised she looks similar to Ishtar, but they reveal they've already to see her true form. They also reveal to her she showed her true form when she sneezed while speaking to them as Ishtar every night. Overcoming her utter embarrassment, Ereshkigal announces she'll conquer Uruk and seize its Grail before Gorgon destroys the city. Thus, the remaining humans on the surface will become her property in the underworld. Gilgamesh asks Ereshkigal why she abandoned her duty and joined the Alliance, preparing to execute her depending on her answer. She answers she still obliges to her role of managing all humans souls within the underworld. As the group stand her in her way of her plans, she decides to kill them all. Before that though, she asks Ritsuka if she should be punish her for upholding her duty all this time alone. Ritsuka is uninterested though as they understand Ereshkigal is only fulfilling her role. After Gilgamesh explains Ritsuka is telling her work is praiseworthy, Ereshkigal fights the group in her gallû spirit form. After Ereshkigal is defeated, Ishtar is returned to normal size, and Gilgamesh is unbound from the underworld. Ereshkigal prepares herself to be execute, seeing it only just to do so as she was persuaded by Solomon to conquer Uruk. She explains she wanted to gather all of the human souls into the underworld so she may rule over humanity. She believes her wish for domination over humans is a greater evil than Gorgon's wish to destroy them, but Ritsuka calls her a liar. After declaring she hates the living, Ereshkigal is seemingly cut in half by Ziusudra. Ziusudra explains though that he didn't kill her, rather he served her bond with the alliance. Gilgamesh demands to who he is, to which Ziusudra answers he has come from the abyss to set events in motion. He then asks Ereshkigal why she wanted to create a kingdom of the dead, understanding she wanted to dominate humanity out of love from them. When she claims to love only the dead, he and Ritsuka call her liar as they know she loves all humans. Ziusudra then explains Ereshkigal joined the alliance in order to protect as many souls as she could in the underworld. As she begins to lament over she has done, Gilgamesh tells her that bodies whose souls were taken are still stored away, so the souls only to be released from the cages to revive their bodies. He also tell her that the damage she caused to Sumer is negligible compared to Gorgon to her surprise. Ereshkigal says she will not attack Uruk, and while she won't contract with Ritsuka, she'll still help them to repay their kindness. After she returns to her duties, the group return to Uruk.

The group return to Uruk where Ana welcomes back outside the gate. After she leave to help some bulls, the group head to the ziggurat to see Gilgamesh. He immediately begins the strategy meeting for Gorgon upon them entering. Siduri details that Gorgon's forces consists of roughly 100,000 Demonic Beasts gathered in the Cedar Forest currently. Since the beasts outnumber the remaining forces at the Northern Wall by ten times, she fears the Northern Wall won't last half a day if it's invaded, even shorten if Gorgon herself appears. Gilgamesh orders the group to go to Gorgon's base, the Blood Fort, while the forces at the Northern Wall hold off her forces for half a day. The Blood Fort is located in the underground lake deep within the Cedar Forest. Mash states Gorgon will lose much of her Authority once the Blood Fort is destroyed. Ishtar questions how they can destroy it, as the entrance is protected by a Bounded Field. Gilgamesh states Marduk's Axe, which was delivered in the morning by Jaguar Man, will be used to destroy the Blood Fort. Quetzalcoatl questions if her winged serpents can carry the axe from the Northern Wall, where it was relocated to, to the Cedar Forest in half a day. Gilgamesh suggest she throw it instead, which she confirms she can do. However she explains she still bound to the Alliance's rule to not attack each other, and any who break that rule are completely annihilated. Merlin devises a plan where he and Ritsuka will sneak into the Cedar Forest and head to the Blood Fort. Once they're close enough, he'll signal Quetzalcoatl who'll throw the axe to him. In case her aim is off, Merlin wraps a bit of red cloth from his staff around the axe to ensure it reaches him, as the cloth and his staff are one and the same. Gilgamesh states the operation will begin at dawn tomorrow, and the Northern Wall will distract the Demonic Beast while Ritsuka's party sneaks through the Cedar Forest to the Blood Fort's entrance.

Travelling via a carriage summoned by Merlin, the group reach the Northern Wall four hours before daybreak. While the others are resting, Ritsuka talks with Ana on the wall. There she reveals her dislike of humans stems mostly from their habit of condemning the old and ordinary as evil and useless. As an explain of that, she tells Ritsuka about a blind old lady living disheveled house protecting flowers that she helped as a job. Yet despite her blindness and loneliness, she looked happy, and treated Ana with kindness. Ritsuka gives her a floral headpiece the old lady made for her, but she rejects it believing she doesn't have the right to have it. She then leaves saying that she now fights for Uruk's people not just herself. Later, Merlin appears and confirms at Ritsuka's behest that he was the one who sent Bedivere to the Holy Land to correct the Lion King Artoria's mistake. He goes on to explain that due to his half-incubus lineage, he was able obtain a sense of purpose unlike pure incubi. He became a sage because he learned people would accept him if he was one. Despite studying humans and their emotions, he still couldn't understand them nor can he fully experience their emotions. Yet despite saying that, he states human history is the one thing that brings him happiness.

The next day, Merlin tells the group that the soldiers will battle the Demonic Beasts an hour after they leave. Once they get confirmation the battle has begun, they'll head through Babylon to the Cedar Forest, and from there head to the Blood Fort. Quetzalcoatl and Jaguar Man will stay behind to help defend the Northern Wall. The group head towards the ruins of the Babylon where they slaw a pack of Demonic Beasts. As its been a hour after they left, Merlin asks Romani about the current situation at the Northern Wall. He answers the first wave of Demonic Beasts have passed through the Nippur, and will engage against the soldiers in five minutes. He continues the Demonic Beasts are being led by Kingu. Meanwhile back at the wall, the battle against the Demonic Beasts has already begun. Seeing Quetzalcoatl keeping Kingu at bay, the group head towards the Cedar Forest.

Traveling through the Cedar Forest, the group eventually find the Blood Fort. Merlin sends up a massive flare to signal Quetzalcoatl who throws Marduk's Axe to destroy the temple's entrance. Inside the temple, the group find its walls be lined with cocoons containing humans being turned into Demonic Beasts. Romani warns them Kingu is heading their way, and urges them to defeat Gorgon before they arrive. Lead by Ana, the group eventually confront Gorgon in the deepest part of the Blood Fort. Mash asks Gorgon what she want revenge on, but she answers she merely wants to destroy humanity for hating her. After Ritsuka and Mash reject her reasoning, Ishtar calls her a fake who became Tiamat through the Grail's power. She further mocks Gorgon saying the real Tiamat would never use the target of her revenge to get her revenge. Ana agrees with her, and calls Gorgon a monster who lost sight of herself. Seeing Ana suddenly sends Gorgon into a panic as she pleads for someone to kill Ana. Ritsuka deduces Ana's true identity is Medusa, who decides to slay her monstrous self. Merlin tells her action will release the Divinity she held back all this time, which she is fine with. With the other's help, she fights Gorgon while using her Mystic Eyes to offset Gorgon's own. With her defeat, the room begins to collapse yet Gorgon is still immortal and her wounds are already healed. She states she is hearing the voice of a sobbing Mother for whom she's taking revenge for. Ana then slays her with Harpe, with both seemingly dying in the process. Ritsuka lays the floral headpiece meant for her to serve as a grave marker. Romani however states he is getting a reading on the Grail, which Gorgon should've had. Merlin ays she used the Grail to regain her former Divinity yet she possess it herself. As he deduces where the Grail is, Kingu arrives to find Gorgon had already dead. Before fighting the group, they reveals the Demonic Beasts will all die as they only lived because of Gorgon's power. After the fight, Romani reports an number of spatial rifts are suddenly occurring all over Mesopotamia. Merlin is suddenly injured as he realizes what is happening, to which Kingu reveals he trapped Tiamat in a dream to postpone her reveal. They further reveal that she created them and gave them the Grail while asleep with the task of awakening. Merlin realizes Gorgon had gained Potnia Theron by synchronizing with Tiamat, and with her death Tiamat will awaken. As a result of her awakening, Tiamat found Merlin in her dreams and severely wounded him. Seeing the Alliance is no longer necessary, Kingu announces the return of Tiamat. Meanwhile outside at the Persian Gulf, the sea is covered by black mud, and a growing horde of millions of strange creatures also appear. After Kingu leaves, Merlin urges the others to return to Uruk to tell Gilgamesh that one of the Beasts has awoken before disappearing.

Outside the Blood Fort, Romani warns the group of a massive amount of lifeforms are emerging from the Persian Gulf, and they're spreading across all of Mesopotamia at an incredible rate. When Ishtar asks him how long it'll for them to reach Uruk, da Vinci intervenes saying she is taking charge while Romani concentrates on analyzing the lifeforms. She answers Ishtar that around 20,000 of of the lifeforms are heading for Uruk, with an ETA of under three hours. She continues that Eridu has already been attacked, and Ur has an about hour before its attacked. Ishtar goes at supersonic speeds to Uruk ahead of Ritsuka and Mash. Da Vinci orders them to go to the Northern Wall, as it's currently the safest place with it being the furthest from the Persian Gulf. Ritsuka wonders what happened to Merlin, to which Romani answers Merlin's true body was killed when Tiamat woke up, and that the Merlin that interacted with them was apparition.

Ritsuka and Mash travel to Babylon where they encounter Quetzalcoatl. Mash tells her that Merlin is gone, Ana died killing Gorgon, and Ishtar has gone ahead to Uruk. Quetzalcoatl tells the pair that the remaining Demonic Beasts have fled into the forest. She reveals Marduk's Axe lost its Divinity when the Blood Fort was destroyed, and she also lost nearly half of her Divinity. Mounting onto her Quetzalcoatlus, the group fly towards Uruk. Meanwhile in Ur, Benkei defends its citizens from the strange creatures. However he's taken by surprise by the appearance of a familiar person, and he's seemingly killed by them and the creatures.

The group arrive over Uruk to see it burning while Ishtar struggles against the strange creatures. She pleads the others to land and intercept the creatures, and to secure a path to the ziggurat so the citizens can take sanctuary there. Meanwhile on the ground, the strange creatures are slaughtering the civilians and soldiers whose weapons are worthless against them. The group land just in time for Mash to defend a soldier, then they fight the creatures. However they're soon overwhelmed by the sheer strength of merely one creature, which worse by the fact that they're multiplying. Surprisingly the creatures leave, so the group go to the ziggurat with Ishtar. Inside the ziggurat, Gilgamesh orders the surviving citizens to be moved beyond the Northern Wall, and to use Nippur as a temporarily refugee base. Ritsuka tells him of Merlin's warning that Solomon had summoned one of the Evils of Humanity. Gilgamesh reveals the Evils of Humanity are seven entities that destroy humanity, and becoming stronger the more humanity develops. He says though they're not evils that destroy humanity rather they're evils that humanity destroys. He continues they are the original basis for Heroic Spirits, and they're born from humanity's bestial nature, thus their class is Beast. He reveals Tiamat is one of the Beasts, and she has yet to be fully awakened. Quetzalcoatl guesses Tiamat is inside the blackened sea at the Persian Gulf, and that it's the source of the strange creatures. At Gilgamesh's behest, Romani reveals the creatures are made from the Mud of Gods, and compares them to mass produced Enkidus. He names them Laḫmu after Tiamat's first child whose name meant mud; Ishtar is surprised he knew their identity. Gilgamesh reveals the Laḫmu are not just slaughtering the people of Mesopotamia, but also kidnapping them. He continues that reports state the kidnapped were taken to Eridu, and the Laḫmu have made it and Ur their nest. He orders the group to ignore Eridu and go to the blackened sea. He reminds Ritsuka that the Foundation of Humaity will collapse completely if Uruk falls, thus Humanity along with Chaldea will be incinerated. When Ritsuka asks where Siduri is, Gilgamesh reveals she was taken by Laḫmu, and changes his order for the group to Eridu.

Meanwhile at Eridu, Kingu asks Solomon why Tiamat has yet to emerge, to which he reveals she is currently sealed. He also reveals they're responsible for restoring Gorgon's Divinity, and they formed the Alliance. While he does commend their efforts, Solomon orders Kingu to break Tiamat's seal so she can destroy Uruk, thus destroying humanity. He then leaves after asking Kingu if Tiamat really wants to create a new humanity like they believe. Kingu wonders why Tiamat created the Laḫmu after observing them torture another human to death, though they ignored it. They try to hear Tiamat's voice by closing their eyes, but they're unable to since the sea was blackened. They then leave to break Tiamat's seal, wondering who has the power to seal her.

Outside Uruk, the group watch as the survivors evacuate to the Northern Wall, and the soldiers still defend the city. Later, they arrive at Ur to find everyone to have been killed their homes. The group ponder why the Laḫmu kill humans without reason when a group of Laḫmu arrive. After fighting the Laḫmu, they head to Eridu where they find the kidnapped victims gathered in the plaza. A single Laḫmu appears before them, but it doesn't try to fight them. Deciding to ignore the strange Laḫmu, the group go to the plaza. There they witness the Laḫmu forces humans to kill each other, though none are spared even if they follow instructions. After some of the Laḫmu are defeated, the surviving humans try to run to the jungle but some are killed by the Laḫmu. Kingu suddenly attacks and asks them why they're gathering old humans. The group take this as their chance to lead the survivors to safety. Kingu criticizes the Laḫmu for killing without purpose, as they reason humans aren't even a threat. They wonder if Tiamat made mistake in creating the Laḫmu, calling them defects lower than Gorgon's Demonic Beasts. They order the Laḫmu to fall back, still believing themselves to be one of Tiamat's children like the Laḫmu. Mash however reveals to Kingu that they're not Tiamat's child, and their body is actually Enkidu's body. She believes they're a synthenic Demonic Beast created from Enkidu's corpse for the purpose of awakening Tiamat. Kingu declares themselves to be still Tiamat's child even if they weren't born from her. The Laḫmu then reveal that Tiamat to learn as the new humans from the old humans. However all they learned from humans was how to kill for the pure enjoyment of it. A Laḫmu then rips the Grail from Kingu's body, which makes Romani realize Gorgon retrieve its power through Kingu. The group try to take the Grail from the Laḫmu that seized it Kingu. However it's defended by the other Laḫmu, as it swallows the Grail and grows a pair of wings. The group fight it to prevent from flying to Tiamat to fully awaken her. Meanwhile in the jungle, Kingu tries to fight the Laḫmu chasing them, but their attacks are rendered useless without the Grail. Back in the plaze, the winged Laḫmu, Bel Laḫmu, flies away, so Ishtar tries to give chase when the other Laḫmu weigh her down. The others mount Quetzalcoatlus and chase after Bel Laḫmu in her stead. Before leaving though, Quetzalcoatl orders Jaguar Man to evacuate and protect the humans.

The group chase Bel Laḫmu to the center of the Persian Gulf where Tiamat is located. Romani warns if the Laḫmu drops the Grail there, then its magical energy will awaken Tiamat. Quetzalcoatlus eventually catches up to Bel Laḫmu and rams it. It crashes onto the shore, so Romani orders the group to go finish it off and take the Grail. Meanwhile back in the jungle, Kingu is still being chased by the Laḫmu. They eventually found, but as they resign themselves to death, they're saved by the strange Laḫmu. Addressing them as Enkidu, It tells Kingu to run and find happiness, and thanks them for being Gilgamesh's friend. After it dies, Kingu is tormented again by Enkidu's memories.

At the Persian Gulf, the group are knocked out of the sky by Ushiwakamaru, whose been corrupted into one of Tiamat's Children. They kill her and try to chase after Bel Laḫmu, but multiple Ushiwakamaru appear. Romani realizes Ushiwakamaru can multiple like the Laḫmu, and reveals she can't be destroyed as her Spirit Origin is mixed with the blackened sea. Ushiwakamaru boasts only the light bands have the power to destroy the blackened sea, to which Quetzalcoatl claims she has a Noble Phantasm capable of just that. While the group were fighting Ushiwakamaru though, Bel Laḫmu had delivered the Grail to Tiamat. After Ushiwakamaru reveals herself to be essentially undead, a large number of Laḫmu emerge from the sea. After Ushiwakamaru converts into mud and sinks into the sea, Mash opts for the group to go protect Uruk, but Ritsuka says they need to go to the observatory.

Inside the observatory, the group are contacted by Gilgamesh who reveals he created a communication system based on Chaldea's own when he went to the observatory with Ritsuka and Mash. Jaguar Man tells them that the Laḫmu attacked Uruk again, but the city was protected thanks to Gilgamesh's Dingr. Gilgamesh warns though that neither the solders nor his magical energy will last much longer. Ritsuka reports Tiamat now has the Grail, and Quetzalcoatl reveals Tiamat used it to control Enkidu's corpse. Gilgamesh then reveals the blackened sea is Tiamat's Authority, which converts any who touch it into her children. Ishtar then arrives and reveals Tiamat's Authority includes self-modification, multiplication, bio-fusion, and the most powerful one, Amino Geas, or cell compulsion. She then tells the group that she evacuated Eridu's remaining population to the basement of the ziggurat. Gilgamesh reveals the sea level started to rise when Tiamat retrieved the Grail, and warns the sea will overflow onto the land in three hours. He further warns the blackened sea will convert the remaining people of Mesopotamia into Tiamat's monstrous children, which will collapse the Foundation of Humanity. Romani then tells the group that the way to stop the blackened sea is to defeat Tiamat herself.

Returning to the Persian Gulf, the group slay a number of Laḫmu and Demonic Beasts emerging from the sea, as they head towards Tiamat. Eventually they encounter Tiamat, who Ishtar reveals was exiled to the World of the Void after she was deemed unnecessary when the environment settled and life was established. Seeing her limbs are still bound, the group go to kill Tiamat before she unleashes a blast equal to a hydrogen bomb towards Uruk. They defeat her, but Mash believes she was letting the group attack her. However, Tiamat's true body emerges from sea, sending a wave of the blacked sea that swallows the observatory. Understanding she impossible to even injure, Romani orders the group to immediately return to Uruk. Tiamat begins to move towards Uruk, sending another wave towards Uruk. Meanwhile, a soldier reports to Gilgamesh that the wave already destroyed Girsu City, and is now flowing towards Umma and Uruk. Gilgamesh orders the Fangs of Napishtim to be deployed, which manages to divert the wave. The soldier warns the Fangs were severely damaged in the process, so Gilgamesh orders them to repaired.

The group return to Uruk's ziggurat where they learn that there are only 500 humans left in Sumer. Gilgamesh says the first dynasty of Uruk has fallen as a result, but he believes civilzation will continue as long as Sumerian culture survives. He then explains the Laḫmu are split into two groups: one turn into spheres at sunset and another flies to protect Tiamat's surroundings. He reads Romani's analysis report on Tiamat, but is disappointed it doesn't note any weakness. Jaguar Man tells him that Tiamat will reach the coast in half a day at her current speed, guessing it'll a take a day to reach Uruk. When Ritsuka asks why she's targeting Uruk, Quetzalcoatl answers it's because the city and Gilgamesh are symbols of Sumerian civilization, thus she wants to destroy it. Romani theorizes Tiamat is invincible due to the fact she cannot die as long as life exists on land. Gilgamesh impressed by Ritsuka having the same train of thought as him, calls Ereshkigal with the Mirror of Kur she lent him. Gilgamesh asks her to send Tiamat to the underworld where she'll be considered the last living being, thus negating her invulnerability. He orders Ereshkigal to open the gate of the underworld across Uruk and bind Tiamat in the underworld. She tells him would originally take her ten years to complete such a task, but says it'll now take three days after revealing she plotted something in Uruk beforehand. Quetzalcoatl notes however the time issue of Tiamat's arrival and Ereshkigal completing her task. Gilgamesh and the others says Ishtar can use Gugalanna to hold Tiamat back. But to everyone's dismay, she reveals she lost Gugalanna who she was looking for Babylon when she first met Ritsuka and Mash. as punishment for her incompetence, Gilgamesh forces her to stand in a corner holding a clay tablet that reads: "Worst Goddess". Realizing they now have no way to combat Tiamat, everyone takes a break.

Later that evening at the embassy, Ritsuka asks Quetzalcoatl if she knew about Tiamat. She answers she knew about Tiamat and Gorgon synchronizing with her consciousness, which deluded her into believing she was Tiamat's second coming. She couldn't tell either Ritsuka or Gorgon the truth despite wanting to be friend. But she was able to tell Ritsuka some of the truth by showing them the prophecy inscribed in the cylinder seal at Eridu. When asked why she didn't tell the truth, Quetzalcoatl answers she wanted humanity to truly hate Gorgon, so they could fight her with all they have instead of pitying her as a fake Tiamat. Ritsuka asks her why she joined the Alliance, and she begins to answers she wanted to kill humans. Jaguar Man interrupts her to reveals she joined to stop the other goddesses by trying to get the Grail of Uruk first.

Later at night, Ritsuka and Mash meet with Gilgamesh at the ziggurat while he goes over his plan. He reveals he told the people of Uruk that the city would be destroyed in six months ago as he foresaw when Solomon sent his Grail into the era, and pulled Tiamat from the World of the Void. He continues Tiamat would have still appeared even if Uruk defeated the Alliance, which he hoped would destroy itself. He commends Ritsuka for fighting the Alliance for the sake of the Uruk's people, which resulted in 500 sumerians surviving when they were fated to die. He then reveals, unlike Ritsuka and Mash what were told, that everything that occurred in a Singularity won't be reversed when the Incineration of Humanity is stopped. He explains even if a Singularity where someone is killed disappears, that person would still be dead in the proper history with only their method of death being different. As such the fall of the first dynasty will still fall even if the Singularity, with only the explanation of how it fell changing. Nonetheless Gilgamesh tells Ritsuka and Mash that their actions still had meaning, and says only those who come after will know the result of their actions. Afterwards on Celestial Hill, while the others are resting, Gilgamesh meets with Kingu, who driven there by Enkidu's memories. He then gives them the Grail of Uruk to serve as their new heart, and tells them that they're worthy of his friendship as he sees them as Enkidu's successor. He then leaves, telling them to do what truly want to.

The next day, the group look over a diagram of Tiamat's true form that Romani made collaborating with Uruk's priests. Gilgamesh tells them of the reports from the surviving academic facilities that theorize Tiamat's legs are too thin to support her giant, and that she can only on water. Believing the theory to be true, he orders the destroy the black mud, Chaos Tide. A soldier arrives to report that Tiamat is continuing her advance and she'll arrive at Uruk in eight hours. Gilgamesh decides they need to destroy her legs, and prepares to order his soldiers into battle when Quetzalcoatl interrupts him. She says she can use Piedra del Sol to destroy the Chaos Tide in Tiamat's perimeter once she comes ashore. Since her Noble Phantasm uses a lot of stamina though, she needs to be close enough to Tiamat, and continuously supplied with magical energy while she deploys it. Agreeing with the plan despite its dangerous, Gilgamesh orders the soldiers to stay on the city walls, and orders the group to enact Quetzalcoatl's plan.

After listening to Gilgamesh's speech while outside Uruk, the group go to the Persian Gulf. Upon arriving there, they fight the Laḫmu while advancing towards Tiamat, but there are too many for them to handle. The Laḫmu's attention is diverted when survivors of Girsu attack them, so Quetzalcoatl order Jaguar Man to protect them. Eventually the group catch up to Tiamat when Ushiwakamaru appears to kill them. However due to her connection to the Chaos Tide, the group are unable to truly kill Ushiwakamaru. When asked why she wants to kill humans, she answers humans selfishly take advantage of and dishonor those who performed selfless deeds. After saying starting over is the only way left for the world, more copies of her appear. But, as her copies prepare to kill the group, Benkei arrives and grabs her. Ushiwakamaru's copies impale both of them, but Benkei still lives and sacrificially uses The Pilgrimage of the Five Hundred Arhat to disconnect her from the Chaos Tide and destroy her. With Ushiwakamaru now gone, Quetzalcoatl unleashes Piedra Del Sol and incinerates the Chaos Tide in Tiamat's perimeter. However, when it reemerges from Tiamat, she prepares to deploy her Noble Phantasm while the Bel Laḫmu attack her. She stops though when she see Tiamat using her horns to fly. Despite her various wounds, she still uses Xiuhcoatl on Tiamat, but her attempt fails and she falls into the blackened sea. Tiamat then discharges more of the Chaos Tide, unleashing more Laḫmu along with it. The group slay the Laḫmu, but Romani warns the Chaos Tide has destroyed the Fangs and is now flowing towards Uruk. Tiamat tries to fly towards Uruk when several large black snakes appear to drag her down. The Laḫmu try to remove the snakes when Gorgon arrives and kills them. She tells the group to retreat back to Uruk while she stays and destroys Tiamat's wings. Mash offers to help, but Gorgon points out how they can fight the Laḫmu, lost Quetzalcoatl, and Ritsuka's emerging necrosis from being drained of their magical energy. Ritsuka decides to heed her despite them and Mash knowing Gorgon is Ana. After the group retreat, Gorgon uses Pandemonium Cetus to destroy one of Tiamat's right horn at the cost of her own life. Yet despite losing one horn, Tiamat is still flying towards Uruk. The group rush towards Uruk before another wave of the Chaos Tide swallow them.

The group arrive back at Uruk only to discover of they, Gilgamesh, and eight soldiers fighting the Laḫmu are the only ones left alive in the city. Breaking through the Laḫmu and Demonic Beasts, the group meet Gilgamesh on Celestial Hill. From there they see that the Chaos Tide has already flowed into the city. When Tiamat arrives, Gilgamesh orders Ishtar to fly above the clouds directly under the sun and await his instructions. He then fires all of the Dingir, which were created by him, infused with his magical energy, and controlled by him, at Tiamat. He takes a shot to heart however when he protected Ritsuka from Tiamat's blast meant for him. Yet despite his mortal wound, he still fires the Dingr. Romani urges Ritsuka and Mash to escape into the ziggurat, as he warns Tiamat will arrive there in three minutes, and the emergence of 8000 Laḫmu. The Lahmu clump together into a mass equaling Gugalanna's hoof to destroy the ziggurat's roof, knocking Ritsuka and Mash out cold. Ishtar prepares to fight the Laḫmu there when Kingu arrives and kill 2000 of them. Declaring themselves to be the only member of the new humanity, they decide to heed Gilamgesh's words, and uses Enuma Elish to bind Tiamat. She soon breaks the chains, thus killing Kingu, and continues to advance to Ziggurat. Ereshkigal contacts Gilgamesh to report the completion of task, so he orders Ishtar to create a massive hole in Uruk down into the underworld. As she prepares to do so, he tells Ritsuka that his death is necessary part of the proper course of history. Tiamat then arrives at the ziggurat when Ishtar's Noble Phantasm impacts it and creates a hole into the underworld, killing Gilgamesh and sending Ritsuka and Mash fall down.

As Ritsuka and Mash falls down into the underwrold, Ereshkigal grants the pair to float in the underworld. They land and see that Tiamat and Uruk have both fallen into the underworld thanks to Ishtar destroying the city's foundations. Ereshkigal with the gallû spirits then attack together to finish Tiamat off, but it's rendered ineffective as the Chaos Tide begins to corrupt the underworld. Tiamat then transforms into her true form as Beast II, and births more Laḫmu that spread throughout the underworld. Jaguar Man then arrives to help the group, and reveals the Chaos Tide will cover the world in less than a day if Tiamat returns to the surfrace. Romani confirms the Chaos Tide has covered most of the underworld, and implores the group to destroy it there before it reach the surface. Fortunately, Tiamat's paradoxical restoration is still ineffective in the underworld, as both the Chaos Tide and the Laḫmu are part of her. Flowers summonsed by Merlin then appear on the Chaos Tide to stop it and drain Tiamat's Authority from it. Merlin reveals he took advantage of the Earth's blank state from the Incineration of Humanity to temporarily physically escape Avalon and return to Uruk. Tiamat then grows wings on her back, and prepares to fly back to the surface. However, Ziusudra arrives and reveals himself to be King Hassan, the Grand Assassin, and severs Tiamat's wings while simultaneously forcing the concept of death onto her. Recognizing her own mortality, Tiamat unleashes more Laḫmu to protect her while she tries to escape to the surface. Ritsuka, Mash, and Merlin then, with Ereshkigal's blessing, fly up towards Tiamat's head where her spiritual core is located. The group breakthrough a number of Bel Laḫmu, but they prove too strong and numerous to handle. Aided by Hassan, the group breakthrough the Bel Laḫmu and reach Tiamat's head. They try to kill Tiamat before she reaches the surface, but she is astoundingly durable. She then takes out Merlin, thus removes his negation of her Authority from the Chaos Tide. Gilgamesh, as an Archer class Servant, then appears to help the group fight Tiamat. After she is defeated, Tiamat detaches from the wall she scaling, and falls down to the bottom of the underworld. Romani warns the group to escape back to the surface, as Tiamat begins to explode.

As their battle was in the air, Ritsuka and Mash manage to escape back to the surface before Tiamat exploded. Mash finds she had the Grail in her hands when she arrived back in Uruk. Merlin reveals he was the one who retrieved it when it spilled out of Tiamat's throat. Quetzalcoatal then appears and puts him in a joint lock, as Jaguar Man reveals she saved her. As the Singularity has been resolved, the Servants begin to disappear, along with Gilgamesh. He also reveals he summoned his Archer self to help fight Tiamat earlier. He gives Ritsuka and Mash the Grail of Uruk, passing it off as gift of wheat ale. After he disappears, the pair begin to be forcibly rayshifted back to Chaldea. Before he returns to his tower, Merlin tells Ritsuka he helped them because he was very interested in their struggle to restore humanity. He continues only he will remember everything that happened in the Singularity. He also reveals he and Hassan were able to manifest in the Singularity due to the appearance of a Beast. After he leaves, Ritsuka and Mash return to Chaldea.

Participants
Servants

Non-Servants