While most mutants' powers manifest at adolescence, Mr. Immortal's ability did not become apparent until he first attempted suicide. He regained consciousness minutes after, only to find that he was alive and fully healed. Deathurge once explained to him that he is a mutant, but not "Homo sapiens superior", the more familiar subspecies of mutant who has simply taken the next step in evolution, but rather he is the final step in human evolution: a man who has evolved past death itself, and is therefore "Homo sapiens supreme". He also explained that he will be around until the end of the universe and the one to whom its final secret will be revealed.