The first X-Men crossover event -- and still the most brutal! When Sabretooth and the lethal Marauders attack the underground mutant 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 very 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 bleaker fate! Psylocke, Longshot and Dazzler join the undermanned X-Men -- just in time to clash with the Avengers -- as Marvel's mutants struggle to recover and rebuild!
COLLECTING: UNCANNY X-MEN (1981) #210-219; X-MEN ANNUAL (1970) #11; X-FACTOR (1986) #9-17, X-FACTOR ANNUAL #2; NEW MUTANTS (1983) #46; THOR (1966) #373-374, #377-378; POWER PACK (1984) #27; DAREDEVIL (1964) #238; FANTASTIC FOUR VS. THE X-MEN #1-4; X-MEN VS. THE AVENGERS #1-4
Written by CHRIS CLAREMONT, LOUISE SIMONSON, JO DUFFY, WALTER SIMONSON, ANN NOCENTI, ROGER STERN, TOM DEFALCO & JIM SHOOTER
Penciled by JOHN ROMITA JR., BRET BLEVINS, RICK LEONARDI, ALAN DAVIS, BARRY WINDSOR-SMITH, BUTCH GUICE, MARC SILVESTRI, TERRY SHOEMAKER, WALTER SIMONSON, DAVID MAZZUCCHELLI, TOM GRINDBERG, SAL BUSCEMA, JON BOGDANOVE & KEITH POLLARD