During her life, Psylocke imprisoned the Shadow King, one of the most fearsome adversaries ever to face the X-Men, in a psychic prison. So long as Psylocke was alive, the monster was chained in his corner of the astral plane. But following Psylocke's death in X-TREME X-MEN #2, the prison doors are wide open! It's mutant mayhem, delivered by the regular X-TREME creative team of writer Chris Claremont and penciler Salvador Larroca, with a little help from outstanding inker Joe Weems! Plus: An all-new prose story written by Claremont with illustrations by an array of awesome artists!