Collects X-Factor (1986) #21-36, X-Factor Annual (1986) #3, Power Pack (1984) #35. Unexpected evolutions! X-Factor is still coping with the loss of their friend and teammate the Angel when the team is suddenly rocked by a traitor! Cameron Hodge, their former publicist, has a horrific anti-mutant agenda — and an army to back up his plans! Meanwhile, the deadly Apocalypse unveils his fourth Horseman, the razor-winged Death — and he's all too familiar a face! How can the team fight a close friend turned deadly foe? In the wake of Apocalypse's attack, X-Factor gains a new home, the bouncing Beast becomes blue and furry once more and the team goes public! But when Cyclops and Marvel Girl begin a search for Scott's missing son, bizarre mysteries are uncovered — and the flames of an inferno begin to flicker!