X-Men: Mutant Massacre

The Morlocks: a community of mutant outcasts living beneath the streets of Manhattan. The Marauders: professional mutant assassins, employed by a mysterious evil to wipe the Morlocks out. In between the two stand some of Marvel's most heroic: X-Men, X-Factor, the New Mutants, Power Pack, Daredevil and the mighty Thor! But taken by surprise by the Marauders' overwhelming onslaught, can these disparate heroes hope to save any of the Morlocks? COLLECTING: Uncanny X-Men (1963) 210-214, X-Factor (1986) 9-11, New Mutants (1983) 46, Thor 373-374, Power Pack (1984) 27, Daredevil 238