Sul-sagana

is a large, jagged Divine Construct sword contained in the Gate of Babylon. Like its paired sword Ig-Alima, Sul-sagana was possessed by the war god , named after his children. There is a possibility that Gilgamesh named the swords after those of legend, such as with Ea, so it is unknown if it is the genuine sword or simply crowned with the same name. 
The sword possesses the concept of "horizon" at the end of the sky and sea, the peak of "the territory in which they melt and mix." Granted the alias , it is that which "burns down even a myriad of seas." It is a sword blade of pure fire, "molded as a peak resembling a cluster of lava." It acts as a "furnace that melts down everything" when the "direction of the dawn" is granted to it. Flames of purging that burn down and make all into one continually spring up from it. It is said that "Before the bright-colored brandishing of the sword, right and wrong, whatever was the enemy ― They are equally molten inside the daybreak."
As a Divine Construct, it shouldn't be possible to replicate the sword with the Gradation Air of Unlimited Blade Works, but the power of the Holy Grail makes it possible for Shirou Emiya to superficially project the paired Divine Constructs and counter them. The reproduction is named .Fate/kaleid liner PRISMA☆ILLYA 3rei!! - Chapter 39: "Thank You and Farewell"
==References==
Category:Noble Phantasms
Category:Swords
Category:Unclassified Noble Phantasms
Category:Unknown rank Noble Phantasms
Category:Divine Constructs
Category:Noble Phantasms introduced in Fate/kaleid liner PRISMA☆ILLYA
Category:Noble Phantasms in Gate of Babylon
Category:Noble Phantasms in Unlimited Blade Works