The end of an era for the X-Men! The original team, now called X-Factor, takes center stage when Proteus returns from the grave. But when Apocalypse strikes, infecting Cyclops' son Nathan with a deadly virus, Cyclops must make a bitter sacrifice! And the current X-Men return to Earth to find that Professor X's old foe the Shadow King has risen -- and taken over Muir Island! It will take X-Factor and the X-Men's combined strength to triumph...and when the dust clears, the two teams will become one! An uncanny new era begins as the reunited X-Men go back to basics -- beginning with a deadly confrontation with Magneto and his fanatical Acolytes! COLLECTING: X-Men Annual (1970) 15, X-Factor (1986) 65-70, Uncanny X-Men (1981) 278-280, X-Men (1991) 1-3; material from New Mutants Annual (1984) 7, X-Factor Annual (1986) 6

As one of the greatest X-Men of all makes her triumphant return, one of mutantkind's deadliest threats debuts! When Jean Grey is found alive -- with a little help from the Avengers and the Fantastic Four -- she reunites with the rest of Xavier's original class to form X-Factor! But as Cyclops, Marvel Girl, Beast, Angel and Iceman face new enemies Tower and Frenzy, little do they know the villains are part of an Alliance of Evil led by ... Apocalypse! Collecting: AVENGERS (1963) #263; FANTASTIC FOUR (1961) #286; X-FACTOR (1986) #1-9; X-FACTOR ANNUAL #1; Material from CLASSIC X-MEN #8, 43.

Collects Avengers (1963) ć Fantastic Four (1961) Ğ X-Factor (1986) #1-9, Annual #1; Iron Man Annual #8; Amazing Spider-Man (1963) #282 and material from Classic X-Men #8, 43. One triumphant return, one diabolical debut! When Jean Grey is found alive - with a little help from the Avengers and Fantastic Four - she reunites with the rest of Xavier's original class to form X-Factor! But as Cyclops, Marvel Girl, Beast, Angel and Iceman face new enemies Tower and Frenzy, little do they realize the villains are part of an Alliance of Evil led by...Apocalypse! They'll fight Iron Man and Spider-Man, encounter uncanny foes such as Bulk and Glow Worm, and take on old sparring partners in Freedom Force - but there's no question who will rise to the role of X-Factor's arch-nemesis. The story of En Sabah Nur begins here!

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!

Collecting X-Factor (1986) #71-83 and Annual #7 and Incredible Hulk (1968) #390-392. A new team is forged! Cyclops and company have rejoined the X-Men — and now Havok takes charge, leading a new government-sanctioned mutant squad! His recruits include Polaris, Wolfsbane, Quicksilver, Strong Guy and Multiple Man — but will the real Jamie Madrox please stand up? The new XFactor must deal with murder mysteries, identity crises, smear campaigns and more — but Mr. Sinister and his Nasty Boys might be too much for them! The Incredible Hulk awaits in a foreign land, and the Mutant Liberation Front and Brotherhood of Evil Mutants heat things up at home, as the new X-Factor deals with diplomacy, deception and death while protecting Homo sapiens from their genetically challenged brethren and vice versa! X-perience Peter David’s hilarious mutant masterpiece from the beginning!

The X-Men fight crime and battle evil.

Collecting X-Men Annual (1970) #15, X-Factor (1986) #65-70, Uncanny X-Men (1981) #278-280, X-Men (1991) #1-3 and material from New Mutants Annual #7 & X-Factor Annual #6. The end of an era for the X-Men! The original team, now called X-Factor, takes center stage when Proteus returns from the grave. But when Apocalypse strikes, infecting Cyclops' son Nathan with a deadly virus, Cyclops must make a bitter sacrifice! And the current X-Men return to Earth to find that Professor X's old foe the Shadow King has risen -and taken over Muir Island! It will take X-Factor and the X-Men's combined strength to triumph...and when the dust clears, the two teams will become one! An uncanny new era begins as the reunited X-Men go back to basics - beginning with a deadly confrontation with Magneto and his fanatical Acolytes!