"While searching for the energy of the Black Lantern- simultaneously sending various Doomsday 'clones' created from the original after the other members of the Superman family to distract them, and advised by a robotic duplicate of Lois Lane- Luthor encountered Brainiac in space while attempting to alter the last of the Black Lantern energy, acting upon an unspoken theory of his. Brainiac revealed that Loisbot was an unwilling pawn in his bid to hijack Luthor's quest. Luthor then replied that he had anticipated this for some time, and he then attacked Brainiac and snapped his neck, temporarily incapacitating him. Loisbot pleaded for Lex's forgiveness, and he accepted her apology. However, after he altered the four remaining black spheres, he opened a Phantom Zone portal which unleashed an extremely powerful, monstrously large being which prepared to kill all life in the universe, because the negative emotions of sentient creatures hurt it. Luthor promptly impaled Loisbot's head, allowing himself to be infected with Krypontian technology which he used to engage the monster on a mental plane of existence. Grappling with the creature, Luthor's body and mental essence suddenly fused with it,"
Come find me when Tony beats a godlike being in a mental battle.