In 1985, the milestone Uncanny X-Men #200 established a new status quo for Charles Xavier's School for Gifted Youngsters. Chris Claremont's classic "Trial of Magneto" saw the master of magnetism stand before the International Court of Justice and face charges of crimes against humanity for his super-villainy — Magneto's attempts to protect homo superior from extermination by becoming humankind's would-be conqueror. Xavier, suffering from a failing heart that could be treated only by the Shi'ar Empire's advanced alien technology, left Earth with Empress Lilandra and entrusted Magneto with a great responsibility: carry on in Xavier's place as headmaster and teach the New Mutants.