The demon known as Belasco is burning a path around the globe searching for the legendary Bloodstone. With it, he can rip open a dimensional portal, allowing all of Limbo to pour into our world! Enter Storm, Banshee, Sunfire, Colossus, Nightcrawler, Wolverine and the new mutant who took on the namesake of Thunderbird! But can even this team (that first formed 25 years ago in GIANT SIZE X-MEN #1) stop the fiery fiend from stealing the souls of their most cherished loved ones—the members of the original X-team? All this, plus the return of Magik! But who is the girl in the Eldritch Armor? Is she a friend back from the dead...or a new enemy in disguise?