Mephisto, sometimes using the name Mephistopheles or even Satan (among many others) is a powerful demonic super-villain from Marvel comics and is one of several such demons that feed off humanity's belief in The Devil so as to masquerade as Satan himself. In reality however Mephisto's origin seems to lie with the primordial Elder-Gods that ruled earth before being banished by Atum the God-Eater, the exact nature of this origin varies with story to story but tends to vary between the old gods becoming corrupt or the demons being formed by the already plentiful corruption found in the Elder-Gods.