Essential X-Men, Vol. 7 #

In the wake of the Marauders’ Mutant Massacre, the X-Men go mobile to plan their next move–but recruiting Dazzler and Havok brings them even more catastrophe! And with a teammate’s life on the line, the mutant marvels are forced to fight the Fantastic Four and seek the genius of Doctor Doom!
Collects Uncanny X-Men #214-228 & Annual #10-11 & Fantastic Four vs The X-Men #1-4