Professor Xavier is Onslaught? Questions will be answered about the X-Men's most insidious villain in this tell-all issue. Is Xavier truly the traitor his team of mutants believes him to be? And who is really behind the devastation of Onslaught?

Professor Xavier is Onslaught? Questions will be answered about the X-Men's most insidious villain in this tell-all issue. Is Xavier truly the traitor his team of mutants believes him to be? And who is really behind the devastation of Onslaught?