A 1987-1988 Marvel crossover involving the X-Men, X-Factor, and New Mutants. Written by Chris Claremont, Louise Simonson, and Walter Simonson with art by Marc Silvestri, Bret Blevins, and Walter Simonson.
The arc spans Uncanny X-Men #225-227, X-Factor #24-26, and New Mutants #59-61. The X-Men face the Adversary in Dallas, X-Factor confronts Apocalypse and his Horsemen, and the New Mutants deal with the Ani-Mator. Angel is transformed into Archangel during this storyline.