X-Men: Mutant Massacre
Chris Claremont, Walter Simonson, and Louise Simonson (Writers); Walter Simonson, John Romita Jr., John Bogdanove, Sal Buscema, Bret Blevins, Rick Leonardi, Alan Davis, and Jackson Guice (Artists)
The Marauders - professional mutant assassins, employed by a mysterious evil, with the job of wiping out the entire Morlock community living beneath the streets of Manhattan. And the only hope of salvation the Morlocks have rests in the hands of the X-Men! But can they stop this deadly onslaught? And what do they stand to lose if they should succeed?
Uncanny X-Men #210-213, X-Factor (Vol. 1) #9-11, New Mutants (Vol. 1) #46, Thor (Vol. 1) #373-374, Power Pack #27