Issue: #26
Prologue to the next big story! Two years before the events of ULTIMATE X-MEN #1, how did Professor X's greatest friendship dissolve into hatred?
First appearances: Detonator
Creators: Mark Millar, Chris Eliopoulos, Ralph Macchio, Ray Lai, Dave Stewart, Ben Lai
Characters: Magneto, Scarlet Witch, Professor X, Quicksilver, Sabretooth, Blob, Moira MacTaggert, Proteus, Detonator
Story arcs: Return of the King