The Onslaught Crossover main story starts here! The X-Traitor is revealed to be Professor Xavier and he wants the X-men dead! Continued in Onslaught: Marvel Universe.
Collected EditionsX-Men/Avengers: Onslaught Volume 1X-Men Milestones: Onslaught
— Description from Comic Vine community (comicvine.gamespot.com · https://comicvine.gamespot.com/onslaught-x-men/4050-18280/).
