X-Men: Mutant Massacre

"Mutant Massacre", also known as the Morlock Massacre, is a fictional storyline published by Marvel Comics. It ran from October, 1986 to January, 1987 and crossed over into issues of Uncanny X-Men, Volume 1, X-Factor, Volume 1 and New Mutants, Volume 1 with spin-off crossovers taking place in issues of Power Pack, Volume 1, Daredevil, Volume 1 and Thor, Volume 1.

Plot
Mister Sinister stages a massive assault against the Morlocks using a team of super-powered clones called the Marauders. The deadliest among their number however, is the feral killer known as Sabretooth. The Marauders begin indiscriminately slaughtering as many Morlocks as they can find. When word spreads about what is happening, several mutant superhero teams get involved to help out, including the X-Men, X-Factor, Power Pack and even the Asgardian God of Thunder, Thor. The casualties are high and the X-Men have to set up a triage for Morlock survivors at the Xavier's School for Gifted Youngsters. Through the course of this, Angel suffers injuries so severe that they will ultimately alter his life forever. Wolverine engages in multiple one-on-one battles with his nemesis Sabretooth, and Colossus takes a life for the very first time.

Issues

 * Chapter 01: Uncanny X-Men 210
 * Chapter 02: X-Factor 9
 * Chapter 03: Uncanny X-Men 211
 * Chapter 04: X-Factor 10
 * Chapter 05: New Mutants 46
 * Chapter 06: Thor 373
 * Chapter 07: Power Pack 27
 * Chapter 08: Uncanny X-Men 212
 * Chapter 09: Thor 374
 * Chapter 10: X-Factor 11
 * Chapter 11: Uncanny X-Men 213
 * Tie-in: Daredevil 238

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