Apocalypse (En Sabah Nur) is a <!--Do not add "fictional" as it is tautological; supervillains (and characters in general) are by definition implied to be fictionalized to some extent.-->supervillain appearing in American comic books published by Marvel Comics. He is one of the world's first mutants, and was a principal villain for the original X-Factor team and later the X-Men and related spin-off teams. Created by writer Louise Simonson and artist Jackson Guice, Apocalypse first appeared, unnamed, in Marvel Graphic Novel #17 (July, 1985) and his full debut in X-Factor #5 (June 1986). Apocalypse is one of the most powerful beings in the Marvel Universe and the father of the original incarnation of the Horsemen of Apocalypse.
Since his introduction, the character has appeared in a number of X-Men titles, including spin-offs and several limited series. Apocalypse has also been featured in various forms of media, including a featuring film where he was portrayed by Oscar Isaac in X-Men: Apocalypse.
Conception and creation
While writing the first five issues of X-Factor, Bob Layton dropped hints of a villain operating behind the scenes and leading the Alliance of Evil (mentioned in X-Factor #4, May 1986). Layton intended to reveal this character to be the Daredevil villain the Owl on the final page of X-Factor #5. However, Layton left the book after writing this issue and was replaced by writer Louise Simonson. Editor Bob Harras said that the character arose because of storytelling needs: "All I had communicated to Louise was my desire that an A-level, first class character be introduced. I wanted a Magneto-level villain who would up the stakes and give the X-Factor team reason to exist." Simonson described the character thus: