X-Men: Mutant Massacre

Collects Uncanny X-Men (1963) #210-214, X-Factor #9-11, New Mutants #46, Thor #373-374, Power Pack #27 & Daredevil #238. The Marauders - professional mutant assassins, employed by a mysterious evil, are tasked with wiping out the entire Morlock community living beneath the streets of Manhattan. And the only hope of salvation lies in the hands of the X-Men!