Mutant Massacre

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"Mutant Massacre"
Cover of X-Men Mutant Massacre  (2001), trade paperback collected edition, art by Terry Dodson
Publisher	Marvel Comics
Publication date	October – December 1986
Genre	Superhero Crossover
Title(s) New Mutants #46 Power Pack #27 Thor #373-374 The Uncanny X-Men #210-213 X-Factor #9-11 Daredevil #238
Main character(s)	X-Men X-Factor Thor New Mutants Power Pack Marauders Hela
Creative team
Writer(s)	Chris Claremont Louise Simonson Walter Simonson
Penciller(s)	John Romita Jr. Walter Simonson Sal Buscema
Inker(s)	Dan Green Bob Wiacek Sal Buscema
Letterer(s)	Tom Orzechowski Joe Rosen John E. Workman Jr.
Colorist(s)	Glynis Oliver Petra Scotese Christie Scheele
Mutant Massacre	ISBN 0-7851-0224-8

"Mutant Massacre" was a 1986 Marvel Comics crossover storyline. It primarily involved the superhero teams the X-Men and X-Factor. The solo hero Thor, the New Mutants, Power Pack, and Daredevil crossed over for an issue each in their own comic books.

The crossover was a surprise success, yielding sales boosts to the mutant-based books and prompting Marvel Comics' long-running policy of holding such mutant crossovers annually.^[1]

The story depicts a massacre of the Morlocks during an attack by the Marauders. The X-Men, X-Factor, and Power Pack attempt to intervene, with the X-Men having three of their members injured in the conflict.