History
Lord Gaea was created by Titan computer I.S.A.A.C. to serve ISAAC, alongside Elysius, Stellarax, Dionyus and other Titans after I.S.A.A.C. was corrupted by Thanos, who implemented a failsafe that would create new constructs to continue his plans to destroy all life in the universe. He was one of ISAAC's lieutenants and he was stationed at the roots of the Tree of Eternity with "Earth-Demons" as his soldiers, who were able to shapeshift.[1]
Lord Gaea and his minions laid a trap for Captain Marvel and Drax the Destroyer when the duo easily dispatched his troops, Gaea told them, that the whole world of Titan was redesigned to specifically trap and kill Captain Marvel.[1] Following their conversation, Drax shoot the ground above them, burying and seemingly killing him.[2]
Later, Lord Gaea was resurrected along with the other lieutenants by a now mobile I.S.A.A.C-Prime. with his powers being significantly increased and sent against Captain Marvel, Drax, and the Titans.[3] He was evidently killed by Captain Marvel in their final battle.[4]