X-Men - Mutant Massacre (2010)

Collects Uncanny X-Men (1981-2011) #210-214, X-Factor (1986) #9-11, New Mutants (1983) #46, Thor (1966) #373-374, Power Pack (1984) #27 And Daredevil (1964) #238.
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 lies in the hands of the X-Men!