X-Men: Mutant Massacre Omnibus — Marvel
Issue: #1
The first X-Men crossover event - and still the most brutal! When Sabretooth and the lethal Marauders attack the underground outcasts known as the Morlocks, the X-Men, X-Factor and New Mutants join forces to stop them - with help from Thor, Daredevil and Power Pack! But the cost of victory is high, and many X-Men come away badly injured. While Shadowcat might be saved with the Fantastic Four's hel...
Creators: John Romita Jr., Chris Claremont, Jim Shooter, Louise Jones Simonson, Sal Buscema, Jon Bogdanove, Walter Simonson, Tom DeFalco, Bret Blevins, David Mazzucchelli, Terry Shoemaker, Marc Silvestri, Tom Grindberg, Keith Pollard, Barry Windsor-Smith, Roger Stern, Alan Davis, Mary Jo Duffy, Rick Leonardi, Jackson Butch Guice
Characters: Kitty Pryde, Angel, Apocalypse, Beast, Colossus, Cyclops, Emma Frost, Havok, Iceman, Jean Grey, Juggernaut, Lockheed, Magneto, Nightcrawler, Phoenix Force, Betsy Braddock, Sabretooth, Storm, Wolverine, Captain Britain