Gate of Babylon

The Gate of Babylon: King's Treasure is the golden key that connects to the "Golden Capital", the "King's Treasury" of Gilgamesh. It connects the space of reality to the vault, opening an "invisible door" that allows for the contents to pass through upon the user's command. Allowing for easy access to the items of the treasury, he is able to pick and utilize them as he pleases. The rank of the Noble Phantasm changes from "E~A++" due it reflecting ranks of the contents of the treasury. It is a Noble Phantasm that becomes more powerful with the user's wealth, but it also would not be a useful Noble Phantasm without a wealth of valuables. It is also once referred to as an EX ranked Noble Phantasm by Tokiomi Tohsaka due to containing Ea. The items that pass through the gate form glowing ripples in the empty air as they appear. He can summon items directly into his hand, pull out weapons from directly behind him, or prepare numerous weapons in the air, loaded like bullets. There are probably imitations like the Road of Babylon (ロード·オブ·バビロン) as well.

Although he possessed the treasury in life, he never thought about utilizing the treasures as projectiles until his first battle with Enkidu. Forced to draw out the treasures he had carefully stored away was initially humiliating for him, but eventually came to enjoy it and brought them out without regret. He later commented that his treasury was in disarray since meeting Enkidu, calling it a "harebrained habit" that Enkidu instilled upon him. Its usage is why Gilgamesh is of the Archer class, firing the Noble Phantasms like bullets to make him the Archer with the strongest arrows. Producing an excellent ratio of destructive power to magical energy efficiency, the real cost is not within the Noble Phantasms acting as bullets but rather the mere activation cost of the Gate of Babylon. Compared to Heracles, the indomitable "ultimate expression of human perseverance", the treasury is the exact opposite as the infinite "ultimate expression of overwhelming force." He can ready numerous weapons, letting their hilts stick out when he is waiting and instantly showing the blades when about to fight. They move and take aim at the target according to Gilgamesh's will, allowing him to fire without having to even touch them.

Gilgamesh can send out as little as one or two weapons or enough at a single time that it becomes comparable a torrent of "gushing water" directed at the opponent. He will increase the amount depending on the situation, opening the Gate wider to reflect his anger or when forced to become more serious. He'll generally use weak treasures unless the situation should call for his highest class of treasures, such as in the case of Heracles' God Hand. He can prepare and launch dozens, hundreds, and even thousands if he is serious. Upon firing them, he can allow them to pierce the ground after striking the target, causing a large amount of destruction with each weapon that is comparable to something being blown up by an explosive blast, or he can instantly return them to the vault before they hit the ground at such a speed that they appear to have been illusory. He utilizes a Noble Phantasm to retrieve any weapons left on the battlefield, instantly dissipating and returning them to the vault. He can leave them out if he wishes, such as when they've been "stained" by striking Caster's summoned creature.

Upon snapping his fingers or without even a gesture, the weapons can be continuously launched at the opponent without a break. Each weapon has the ability to cause certain death to an opponent, and they are shot with enough force to repel a swing from Berserker's large axe-sword. While it is possible to block many of the strikes, to do so without knowing the abilities of the weapons can be seen as suicidal. He will generally fight at long range while shooting projectiles from behind him directly at the opponent, but he can also freely move with the portals also moving with him. He can freely deploy the portals mid-air while piloting Vimana as well. When fighting at extremely close range, he shows the ability to loose weapons from above, below, and to the side of the opponent. He can also summon weapons completely around the target for a full 360 degree barrage that should generally leave not even a single trace of flesh from the opponent. When closed upon by a target, or simply to play with the opponent, he can freely draw weapons into his hands for melee combat. The ability to handle them depends upon the user's capability. Gilgamesh makes use of the many unknown abilities of the weapons, and constantly switches them to keep his opponent off-guard.

Knight of Honor is considered to be a natural counter to the Gate of Babylon, but Lancelot is only able to keep up with Gilgamesh to such a degree because of his Mad Enhancement. While capable of playing around with Saber in close combat in the Fate route, he would be outclassed in a sword fight with Assassin, so he would not even attempt it. As he is a "king who possesses over a thousand weapons" rather than a "warrior who chose the path of taking a single Noble Phantasm to its ultimate limit," Shirou Emiya declares Gilgamesh to possess only one ability like himself. As an "owner" like Shirou, Gilgamesh is not a "wielder" able to use a weapon to its maximum potential. Within Unlimited Blade Works, Shirou's swords are always ready and waiting, allowing him to be one step ahead of Gilgamesh who possesses the same ability. While Gilgamesh can defeat one who has mastered their weapon with his infinite weapons, Shirou is unable to accomplish that same feat, so Gilgamesh is the only enemy he can defeat.

Key
Key of the King's Law, Bab-ilu (王律鍵バヴ＝イル) is a golden key-shaped sword, also described as a "dark red, key-shaped shortsword", that connects to the treasury. He is able to use it to parry a full-power strike from Saber's Excalibur, and Saber first believes it to be a "Noble Phantasm bearing a curse of vengeance." It is implied to be able to open any door so long as it has a lock. While he first uses it to open the Gate of Babylon by saying the name of the Noble Phantasm in the Fate route and opens it once in the Fate/Zero novel to retrieve Ea, all other usages have not been shown to require it. When first bringing forth Ea in the Fate/Zero anime and the Unlimited Blade Works anime, he begins by holding it vertically in the air and turning it so that the parts around its grip begin to rotate, start to glow, and then settle. It releases a large, labyrinth-like, red pattern that can be seen covering the sky from a great distance away, and then it recedes into a small orb from which he pulls Ea.

In life, Gilgamesh ordered a key to be created for his treasury, said in legend to be able to open the gates deep in the Golden Capital. Deciding that none would dare to ever lay claim upon his treasures, he tossed it away as a trifle. It is an ornate key around the length and weight of a small survival knife, decorated with jewels valuable in both the magical and monetary sense. It is saturated in magical energy of an unknown origin. It is also depicted as being similar to Bab-ilu. It was later found by the ancestor of an unnamed magus, who managed to determine that it was the genuine key without ever being able to find the treasury. After it was passed down in the family, the magus uses it as a catalyst to summon Gilgamesh in the False Holy Grail War, and Gilgamesh once again tosses it away upon seeing it.

Contents
Gilgamesh is renowned for having collected all the treasures in the world in his lifetime, amassing a perfect treasury that lacked nothing. As there was nothing he was unable to collect, Gilgamesh was a collector of treasure whose favorite phrase, "I collected all the treasures of the earth," is not a metaphor. As anything can be found within the vault, the amount of wealth within exceeds even his own knowledge. He collected and stored away samples of all the technology that was developed during his age. The desires of ancient humans were similar to those of the current age, so their technology, bolstered by the magical energy being alive and well, was not inferior to that of the modern age. The "Instruments of Hope" that people dreamed of were all realized, and because every single case was requisitioned by the King's hand, his collection is even furnished with airplanes and submarines.

It also contains all of the original bases for all intellectual properties produced by mankind that originated in his kingdom, making board games and the works of the no more than imitations. It is still sought out by some magi, believed to hold all things in the world and enshrine every possible magical artifact. That within are not merely riches, but his collection is the very "origins of human wisdom." That which is missing from the vault would be items produced with completely new concepts by a new human race, and items produced with extraterrestrial intelligence and technology. He is the original hero, so all heroes of various myths are derived from his legend. It may be a paradox, but he, as the original, must possess that which can be handed down as the Noble Phantasms possessed by those later heroes derived from him for that reason. These weapons are technically nameless, the original Prototypes of the Noble Phantasms (すべての宝具の原型) and the common points before they became objects of faith that act as the foundations for their legends.

Each treasured weapon is decorated with dazzling ornaments and polished to a mirror-like shine, all clearly sporting the magical energy to define them as divine mysteries without exception. He says God Hand, a Noble Phantasm formed from Heracles' life and legends, is the one asset he lacks. They are the original models of every legend, myth, and folklore. He says he wishes to obtain Kavacha and Kundala, and he is surprised by Avalon's existence. It is also possible, such as with Vasavi Shakti, that he cannot tell if something corresponds to the treasures in his vault. Karna's legend records that he "has" the spear, but there is no description of it "being used." It does not exist in his eyes due to never having been described, so he wishes to obtain it.

The weaponry contained within includes swords, pole-arms, lances, hammers, shields, demonic swords that later made their way to Europe and South America, and a number of weapons unidentifiable to Shirou from sight, all of which form a perfect treasury of masses of unused weapons that simply went to sleep with the king. He owns the treasured swords that saved later heroes and the cursed swords that stole the lives of heroes, and their numbers are approximately infinite. After Gilgamesh's death, the contents were spread all over the world after being passed on or stolen, and the treasure, valued because they were splendid swords, eventually became Noble Phantasms.

Shirou states that the quality of the weapons makes the Noble Phantasms used by others look like fakes themselves. While Cú Chulainn has the Gáe Bolg that became famous, Gilgamesh possesses a weapon that later became the Gáe Bolg, but wasn't famous at the time Gilgamesh owned it. The only item contained in the vault that was not passed on to another user than Gilgamesh is Ea, a sword unique to only Gilgamesh. Shirou claims that even though he cannot see them all, he can feel that their numbers are infinite. If weapons of a previous incarnation meet those that descended from them, such as Gram facing Caliburn or copies facing originals, the deteriorated newer model will always lose.

It contains numerous A rank weapons, capable of piercing God Hand dozens of times to take eleven of Berserker's lives and then piercing him with twenty-three more weapons afterward. Just a single weapon is enough to pierce Caster's strongest shield, and keep any other another Servant on the defensive. The numerous weapons contain various different effects and abilities, allowing him to assault the weaknesses of any Servant. This places him at an advantage over most Servants in combat, such as attacking with a weapon strong against a certain attribute or assaulting a Servant with a weapon they were specifically weak against during life.

The Gate can also carry living beings, as shown when Gilgamesh uses the Gate to transport Shinji Matou to the Einzbern Castle.

Named items

 * Bullworker: (全く簡素な試練（ブルワーカー）) is a device used to train muscles.
 * Caladbolg
 * Command Spells of an unknown number have been collected by Gilgamesh in the Moon Cell. They are the lifeline of Masters in the Moon Cell Holy Grail War, so it is unimaginable that a Servant would be able to provide a new set to his own Master. While such a thing should shake the Holy Grail War, Hakuno Kishinami rationalizes that Gilgamesh is simply such a Heroic Spirit, proving why he is sealed within the Far Side.
 * Dáinsleif (ダインスレフ) is a demonic sword from the Nibelungen. It is a sword that has been in two myths, with both versions showing its frightening nature. Within the, it is a sword that was part of 's collection of treasure, taken by the clan that killed the Northern European hero, Sigurd. It is a cursed Noble Phantasm that contains a powerful curse of "reparation" to be used on its target, and it also drives the fate of its possessor to ruin and causes them to surely die. Within the , it is possessed by the Danish king, Hogni. He became locked in eternal combat with the king of Serkland, Hedinn, due to the sword's curse, which requires it to always kill a man once drawn and does not allow it to return to its sheath until such is accomplished. While demonic and holy swords carry with them both glory and destruction, Dáinsleif is said to only bring the latter onto its master.
 * Durandal: The Peerless Sword is the holy sword favored by the paladin leader of the Twelve Peers, . It was granted to King Charlemagne of the Frankish Empire by an angel, and awarded to Roland. Appearing in the “Song of Roland", it is a symbol of power splendidly forged much like Caliburn, having been the emblem of the Battle of Roncevaux Pass. It is a dazzling sword that possesses three miracles that allow it to maintain its sharpness even after its possessor's magical energy is depleted. Though Roland, on the verge of death in battle, had wished to destroy it to keep it from falling into enemy hands, it proved to be completely indestructible. It was featured later prominently in the various legends concerning Charlemagne, eventually becoming a symbol of the knight Roland’s bravery.
 * Ea - Ea is the most powerful weapon inside the Gate of Babylon, and it is the one favored by Gilgamesh. He is able to use a rain of weapons to keep the opponent off-guard while preparing to use it.
 * Enkidu
 * Gáe Bolg
 * Gram (グラム) is the sword of the sun wielded by Sigurd, the greatest hero of Northern Europe in the Völsunga saga. It is a demonic sword of glory and destruction that is the model of Caliburn in the legend of King Arthur and also based on Merodach. Their true natures, the ideas behind their creation, and their souls are very similar. As Caliburn was a "sword stuck in the stone that chooses the king", Gram was also a chosen sword of appointment lodged in the mighty tree of the king of Volsung that was pulled out by Sigurd's father, . Sigurd received the shattered pieces of the sword from his father, Sigmund, and reforged it into a demonic sword capable of killing even a dragon. The legend of Gram and its master, Sigurd, is a tale ripe with glory and destruction fitting the great hero. The later composed Middle Ages Germany retelling, Der Ring des Nibelungen, is a story of a knight equal to the legend of King Arthur with Gram appearing with its name changed to Balmung. It is the greatest of enchanted swords rivaling the greatest of holy blades, and is even equipped with special dragon slaying attributes damaging towards people such as the king of knights who is the incarnation of a dragon. It uses the same ability as Caliburn, a light the burns away everything it touches, that took five of Berserker's lives.
 * Harpe
 * Houtengeki (方天戟) is one kind of halberd passed down in Chinese culture and the only type of halberd out of many to attain the rank of Noble Phantasm, probably due to the use of Houtengageki (方天画戟) by a famous military commander. It is a polearm with many different uses such as thrusting, swiping, pulling, parrying, and various others. Chinese halberds have a spearhead at the tip of the shaft and a blade attached to the side, and the distinguishing characteristic of a Houtengeki is a unique crescent-moon shaped side blade, the “Moon Fang.” Weapons with only one of these blades are called Seiryugeki. It is said that a great deal of skill is needed to handle this weapon, though its versatility and ease of use once mastering it allowed for it to be used to serve the appropriate role for any type of combatant. Its use eventually went out of favor as different dynasties rose and fell until it was revived during the Song Dynasty as Houtengeki.
 * Merodach: The Original Sin is the originating sword that eventually led to the legends of both Gram and later Caliburn. The word Merodach is a form of the name of Marduk, the patron god of Babylon.
 * Potion of youth
 * Sha Nagba Imuru: The all-knowing, all-powerful star is the Noble Phantasm owned by the child form of Gilgamesh in the Fate/hollow ataraxia card game. It allows him to view some of the cards in the opponent's hand and deck. It is unknown if either form of Gilgamesh possesses it outside of the card game.
 * Vajra (ヴァジュラ) is a weapon appearing in the of ancient India. It was a weapon crafted by Tvastar, the maker of divine instruments, using the bones of the sage, Dadhichi. It became symbol of divinity of, the god of lightning, and the indestructible diamond pounder (金剛杵) weapon carried by the gods of Buddhism. It was held in one interpretation to be a manifestation of Indra’s lightning, which is supported by its deceptions as a golden projectile and its appearance unbefitting of a conventional weapon. Vajra was initially known by its proper name of Vjaya when Indra was first introduced to India as a phenomenon that spread from the . Along with Indra, whose name changed to , his divine symbol also had its name changed and became known as Vajra after the age of Buddhism as India's main religion began. It is a simple weapon that can only be shot only once for a fixed B+ rank damage separate from the user's magical energy supply.
 * Vimana

Unnamed items

 * Anti-spirit incense - Anti-Spirit Incense (反魂の香) - When facing Avenger's corpses, Child-Gil spreads a silver ash around himself. Forming a mist with a peculiar scent, it attracts the corpses to him.
 * Armor -
 * Auto-Defensor - The Auto-Defensor (自動防御) is a series of golden discs that float in the air to intercept attacks coming within range, able to be set up so as to protect an entire floor of a building. At twenty meters, it automatically sends out an innumerable series of small lightning bolts to strike down the target. It is possible for attacks like the arrows of True Archer to slip through the defenses despite the great speed of the lightning.
 * Defensive armament that protects against the Multi-Dimensional Refraction Phenomenon that is capable of stopping Tsubame Gaeshi.
 * Golden Armor
 * Mirror shield used to effortlessly repel strong magecraft.
 * Axes -
 * Axe able with the ability to change its path after being avoided by the target, allowing it to turn around in mid-air towards the target at a speed that allows them to match the pace of a jet.
 * Golden axe - One of the few melee weapons Gilgamesh uses in the Moon Cell, the golden axe is used to slash the opponent and hit them with a heavy overhead chop. When used with the "Clear the Storm" skill, he shatters space with a spinning chop.
 * Heracles' axe
 * Cooking items and food -
 * Fully Automatic Cooker (全自動調理器) - From ancient Sumer, it is a extremely high performance machine able to process even hazardous ingredients like hydra meat without issue. It has a limiter that can be removed to improve performance, but it can potentially break it.
 * Hydra meat - Extremely poisonous, it required a special license to cook that only Gilgamesh ever obtained.
 * Meat that multiplies in proportion to how much is eaten.
 * Poison tasting Noble Phantasm
 * Seasonings and herbs are contained in the vault, but Gilgamesh notes that none could make the almost-poison cooking of Lancer palatable. There is an herb that can prepare the stomach for such a meal, but it causes permanent upon consumption.
 * Tablecloth - Prototype of the Table Cloth of the North Wind (北風のテーブル掛け) of, it will produce the finest of foods the user chants as it is spread upon a table.
 * Wine, "the king's wine" as claimed by Gilgamesh, contained in a set of wine bottles made of heavy gold that are inset with sparkling gems. Rider believes that it could not be brewed by human hands, asking if it is a "drink of the gods", to which Gilgamesh affirms by boasting that "Whether wines or swords, only the best is stored in my treasury."
 * Curtain of Night (夜の帳) is mentioned as something that could be used to counter Gawain, possibly affecting his Numeral of the Saint skill.
 * Golden drill - One of the few weapons Gilgamesh uses in the Moon Cell, the golden drill-like weapon is used to jab at the opponent and damage them with the spinning sword-blades, as well as machine gun and cannon fire.
 * Hammer larger than Saber.
 * Lens - He possesses a golden ring with a single, strangely-warped lens fit inside of it, able to show a distant landscape like a telescope. Gilgamesh uses it to see True Archer twenty kilometers away.
 * Lightning - Gilgamesh launches "lightning without form" as a projectile.
 * Levitation - Gilgamesh possesses a treasure that grants some form of levitation that allows him to stand in the sky high above Enkidu. Upon launching Shinji Matou from a portal, Gilgamesh stops Shinji's descent right before he hits the ground in a similar manner.
 * Machine guns, nuclear warheads, and other weaponry from ancient India that were previously equipped to Vimana. They were removed and stored within the vault.
 * Retrieval-based Noble Phantasm that returns weapons to the vault no matter how far they travel.
 * Ring that wards the gazes of normal people away from the wearer so as not to notice them. It is not powerful enough to affect magi.
 * Sickles -
 * Giant sickle able to cleave a weapon enhanced by Knight of Honor in a similar manner as Gae Dearg.
 * Sickle that drains away magical energy and deals damage while passing directly through flesh and armor without causing any actual physical damage.
 * Scythe able with the ability to change its path after being avoided by the target, allowing it to turn around in mid-air towards the target at a speed that allows them to match the pace of a jet.
 * Spears -
 * Gilgamesh launches a "spear that killed heroes" as a projectile.
 * Golden lance - One of the few melee weapons Gilgamesh uses in the Moon Cell, the golden lance is used to stab at the opponent.
 * Spears capable of piercing through mountains.
 * Swords
 * Golden swords - One of the few melee weapons Gilgamesh uses in the Moon Cell, the golden swords are similar to Enki used by Gilgamesh of Fate/Prototype, but it is unknown if they are the same swords. He uses the single right-hand sword for a regular downward swing and a powerful, quick backhand swing with the "Loose the Winds" skill. He uses both swords in a jumping overhead X-shaped slash.
 * Invisible sword like Invisible Air.
 * Long sword - Gilgamesh launches a "long sword that slayed an oriental dragon" as a projectile.
 * Scimitar able with the ability to change its path after being avoided by the target, allowing it to turn around in mid-air towards the target at a speed that allows them to match the pace of a jet.
 * Swords capable of piercing through mountains.
 * Sword of ice that freezes the space that it cuts, allowing it to cover the target in ice even if they manage to dodge the actual strike.
 * Three-edged sword able to arc behind the opponent to attack them from an unguarded position.
 * Vehicles -
 * Airplanes were created in Uruk due to the desires of humans being the same as those of modern day and that the magecraft of the time meant that the ancient crafts were not inferior to those of modern times.
 * Ship of Light (光の船) that allows him to travel faster than the speed of light. It allows him to instantly return after he is sent to the edge of the Moon Cell's Imaginary Space hundreds of lightyears away. When the feat is questioned, he mentions that it is obvious that he would have a Noble Phantasm corresponding to a technique that sends the target to the edge of space, as his vault holds the origin of human wisdom.
 * Submarines were created in Uruk due to the desires of humans being the same as those of modern day and that the magecraft of the time meant that the ancient crafts were not inferior to those of modern times.

Fate/kaleid liner PRISMA☆ILLYA
The Gilgamesh of the Fate/kaleid liner PRISMA☆ILLYA world possesses a number of Noble Phantasms not shown to be present in the vault of regular Gilgamesh. It is unknown if the contents overlap between the two.
 * Arrow Protection Amulet
 * Ea is Gilgamesh's trump card and most powerful weapon. It is able to tear through the Mirror world and the boundary to Miyu's world. Though it loses to Illya's final attack, he mentions that it was the best he could do while half-incarnated.
 * Enkidu is Gilgamesh's most trusted Noble Phantasm. He is outraged by Angelica's usage of it, and he is able to take it from her. He displays great control over it, allowing him to take a large number of weapons from Angelica into his own Gate of Babylon, take people to safety, and use it as a shield to deflect the thrown Mjolnir.
 * Hades' Cap of Invisibility
 * The Hot Spring Noble Phantasm is able to be established anywhere, even the roof of a building. He is able to modify it to fit Japanese customs.
 * Sul-sagana (シュルシャガナ) is a large, jagged sword that launches a beam-type attack. It is named after a deity in Sumerian mythology.
 * The Shield of the Gods (神々の盾) is a massive, ornate dome-shield used to block an extremely powerful magical attack and Kuro's Excalibur without a scratch. It is destroyed by Illya in her Zwei Form.
 * True Nine Lives
 * Vimana
 * Ig-Alima