Ea

Ea is the most powerful Noble Phantasm contained in the Gate of Babylon. It is a nameless sword, which Gilgamesh personally calls Ea, that is the only weapon solely possessed by him, unlike the other Noble Phantasms that have been passed to other wielders. It is considered his greatest treasure, only using it against those he deems worthy, and his most trusted next to Enkidu. It is a cylindrical, drill-shaped sword with three rotating parts that spin in different directions. Text written in crimson cuneiform lettering is carved into the blade. It is simliar to spear crossed with a bedrock drill designed with multiple gears to dig a gigantic hole by eating at the bedrock little by little. Its material components have no origin on the mortal plane, and thus, Emiya Shirou is unable to analyze or reproduce it through projection.

While Excalibur releases air, the three rotating parts of Ea start spinning rapidly on Gilgamesh's command, once telling it to "wake up", and begin to swallow, compress, and accelerate wind pressure while creating a roaring sound. This wind is compressed into a fake space-time dislocation capable of pulverizing any opposition. This attack that signifies its maximum output is called Enuma Elish (エヌマ・エリシュ), the Star of Creation that Splits Apart Heaven and Earth (天地乖離す開闢の星), which is capable of easily swallowing the energy output by Excalibur and called the "sword that cut the world apart." The maximum output of the sword is four thousand damage compared to an A+++ rank weapon outputting an attack power of two hundred, based upon twenty times the strength stat of the servant with a random boost in strength from the magic stat, though this number can be further increased by the amount of wealth of Noble Phantasms contained in Gilgamesh's treasury with more wealth providing more power. It can only be defended against by an elimination rank AC or a counterattack with an equivalent level of damage. Excalibur and a shield generated by Shirou are capable of slightly offsetting it, though they are left extremely damaged, while Avalon is the only defensive ability shown to completely defend against it.

Ea is said to be the sword used by Ea that divided and created the world in ancient Mesopotamia. The rift created by Enuma Elish is said to be a look at the "truth" of what existed before the world. Referring it as hell, the primordial form of the planet, a land filled with lava, gas, scorching heat, and intense cold, Gligamesh states that it is basis of all legends of lands of the dead. He calls it the origin of the memory of all organisms before the existence of the planet that is no longer found in the imaginations or spoken memories of people, but rather a genetically inherent and repressed knowledge of a place and time when organic existence had been impossible. Using Enmua Elish at its absolute maximum output creates a true hole to this world that takes in all opponents and returns them to nothingness. The weapon "Slash Emperor" used by Ado Edem is also capable of showing a "truth" similar in nature to that shown by Ea.