X-MEN: MUTANT MASSACRE OMNIBUS [NEW PRINTING] | HardcoverSeries: Comic Type: ONE SHOT The first X Men crossover event and still the most brutal! When Sabretooth and the Marauders attack the underground outcasts called the Morlocks, the X Men, X Factor and the 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 help, the Angel contemplates a much