During his millennia of activity, the adventurer and warrior Forgotten One has used the names of or been mistaken for numerous heroes of myth and legend, including Gilgamesh and Hercules.

He became an outcast from his fellow Eternals when their ruler, Zuras, decreed that he had been too proud a meddler in the mortal world and confined him to a sector of Olympus.

He renamed himself Gilgamesh, donning a costume that resembled the hide of the Bull of Heaven and went to work as a monster-slayer.

[8] Gilgamesh was brought to the Eternals' home of Olympia, which had temporarily fallen into the Negative Zone, to recover from his injuries.

[9] He later recovered from his injuries and defeated B'Gon the sorcerer, thereby winning a reputation as a hero on modern day Earth.

While the exact limits are unknown, his immense, superhuman strength makes him the physically strongest of all known Eternals, save for Thanos.

He has not aged since reaching adulthood and he is immune to all known diseases; his body is also highly durable and resistant to physical injury.

He is capable of withstanding high caliber bullets, falls from great heights, powerful concussive forces, and temperature extremes, all without being injured.

To what degree these powers have been developed in comparison with other Eternals isn't known, but the first two have been stated as presumed to be average[citation needed].

He possesses an extraordinary melee capacity, with knowledge of most methods of hand-to-hand combat known in ancient Earth civilizations.

He sometimes wears battle armor of unknown composition, and usually arms himself with simple hand weapons such as an axe, spear, or club.