Gilgamesh was the fifth King of Uruk after the Rebuilding. Both of his parents were Nephilim, who refused to let their son be Incarnated. Being a mortal born of immortals, he became obsessed with gaining immortality. He sought out Utnapishtim and found him in his home near a gateway to the Tree of Life. Utnapishtim gave Gilgamesh two chances to win his immortality, but Gilgamesh failed them both. He returned to Uruk where he realized his immortality lay within the legacy he left. He built Uruk into a great city that the other city-states looked to for guidance. When the Undying King came from the East to conquer Mesopotamia, Gilgamesh was able to organize the city-states of the region into a unified defense that sent the Undying King fleeing back into the East.