While on a mission to apprehend the latest incarnation of the Brotherhood of Evil Mutants, the X-Men discovered a villain amongst their number who was a complete mystery. Little did they know, the alien KOLOGOTH was on a mission of his own! Now, they’re on the verge of discovering Kologoth’s true nature…but will it be too late?
The perfect mutant-killing machine has MUTATED. As the X-Men fight for their lives against the most fearsome SENTINEL yet, one X-Man decides to do the unthinkable! Will it take the life of one X-Man to save the rest?