Mutant Massacre
Story Arc
Description
Mutant Massacre is a 1986 Marvel crossover spanning the X-Men, X-Factor, New Mutants, and Thor titles. The Marauders, mercenaries working for Mister Sinister, launch a brutal attack on the Morlocks in the tunnels beneath New York City.
Story Arc Details
About Earth-616
The primary continuity of Marvel Comics where most titles take place. The designation was first used in The Daredevils #7 (July 1983) by Alan Moore and Alan Davis, originating from Captain Britain comics. Earth-616 serves as the home universe for core versions of Spider-Man, the X-Men, the Avengers, Fantastic Four, and virtually all mainstream Marvel characters.