The X-Men and the FF team up when strange happenings in the Bermuda Triangle threaten the Marvel Universe. Yes, you've seen the X-Men and the FF interact before, but never with Magneto and Dr. Doom on the side of the angels. Don't miss this landmark team-up with an adventure you have to see to believe. Plus: When a medicine woman is at death's door, the demons she's been containing for decades are looking forward to their freedom. Good news: The X-Men are on the scene. Bad news: These demons are out of our mutant super heroes' league. It would be nice to have help from Ghost Rider, but is the new Spirit of Vengeance friend or foe? Collecting X-MEN (2010) #15.1 and #16-19. 112 PGS./Rated T