Mephisto

For a list of Comics and Story-Arcs Mephisto has appeared in see: Mephisto (Appearances).

Mephisto is an immortal demon that has caused many problems in the Marvel Universe. It is possible he is Satan himself. Mephisto has a extremely hightened intelligence, strength, and can use magic. He only appeared in the Spider-Man universe once, under the "One More Day" story-arc, to exchange Aunt May's life for Peter and Mary Jane's marriage. He also made it so that everyone who knew Peter's identity as Spider-Man no longer remembered.