Gilgamesh Xeth'i'stral was the second Arkn brought into existence. He was the First Arkn King.
Xeth'i'stral was created by the Hethe Leg'leg, after he was forbidden to create a Deedrn. At his creation, he was endowed with Leg'leg's cruelty, as well as his destructive nature. Xeth'i'stral aided the Arkn in the first few battles against the Dekn, helping the Arkn lay claim to the First Tree. Due to this, he was renowned among the Arkn, becoming known as the Arkn Lord of Battle.
In time, Xeth'i'stral rose up to become the first King of the Arkn. He took for himself a mate, the Arkn High Priestess Kry'atha. Despite his vow before the Hethe not to spread his legacy by creating a child, Xeth'i'stral attempted to create an offspring with her. The effort failed, and Xeth'i'stral, in his frustration, sought out the affections of a beautiful Arkn Lord and soldier, Hash'bor'kanibal.
Around this same time, Xeth'i'stral became the first of the original four Arkn to attach himself to Humanity, becoming the Guardian of the human Lord Gilgamesh of Mesopotamia. While the intentions were good, Xeth'i'stral mistakenly started the first war of mankind, and became a god in the eyes of Humanity. He took upon himself the name of his guarded human, becoming known henceforth as Gilgamesh Xeth'i'stral.
King Gilgamesh's deification angered Hash'bor'kanibal, who wanted the attention. Hash'bor went down to humanity's realm to "reason with" Gilgamesh, but a fight ensued and they ended up destroying a large portion of humanity along with the Seraphim (save for Phobos). Hash'bor beheaded Gilgamesh and carved his skull into a weapon, revealing himself to be a Dekn Lord in disguise. Gilgamesh's legend did not end there, however; promptly after on-the-spot leaving the Arkn, Hash'bor -- now known as The Carver, and a sworn enemy of the Arkn -- brought the bones of Gilgamesh to a place of pure darkness and began to construct the Infernous.
Once the realm was complete, The Carver allowed Gilgamesh to transfer part of his living legacy into a child before he sealed him away in darkness and torment. From here, his fear and agony began to form itself into a source of pure power, which the Carver used to fuel the molding of the Infernous by trapping Gilgamesh forever in this state of agony. He became known to the Dekn as The Heart of the Infernous. His child was released and placed on the golden steps of the Arkn Cabinet's temple in Elysia, to be trained and raised. This child was the ArknAngel and Arkn King of Battle, Uriel.
The Battle of the Arknza
Some time before the End Times, Gilgamesh was released from his cell in the Infernous. Now revealed to have been the secret partner and ally of The Carver, he was raised into the living vessel of his grandson Ellpagg (now himself being manipulated by The Carver). Gilgamesh joined The Carver on the battlefield, fighting against the ArknAngels (including his own son Uriel). Gilgamesh used Ellpagg's body to kill the Arknangel Raziel (who was attempting to get through to the possessed Ellpagg); absorbing Raziel's spirit gave Ellpagg the strength to break free of Gilgamesh's hold, and the two separated. Ellpagg, now thinking and acting for himself, joined Azrael Michaelis Winter in fighting Gilgamesh; Gilgamesh was defeated and killed -- this time permanently.
Physically, Gilgamesh had long, flowing dark hair and a well-trimmed, full beard. While being one of the most strong Arkn, Gil was not as muscled as his strength showed, as he was more heavyset and tall than muscular. He is described as having been very beautiful in appearance.Gilgamesh was known to don heavy, golden Armor that even had wing plating, allowing the individual feathers to be sword-sharp and battle-ready. His crown was crafted from the very gold that lined Elysia. and his sword was made from the wood of the First Tree, and high-forged Arkn Steel at the courtesy of Helios.
While preferring strength to magick (and being fearful of it), Gilgamesh possessed a very strong tie to magick due to his Hethian blood. Notably, he was able to use Hethian power to create a shockwave (which destroyed a large portion of humanity and his own army of Seraphim).