X-Men United #1 616

WELCOME TO GRAYMATTER LANE, LEARN TO SURVIVE THE EXPERIENCE! “Build a school,” Charles Xavier told them, and the X-Men have done so – but in a manner nobody saw coming! Welcome to Graymatter Lane, a place where mutants anywhere in the world can come together in unity to teach one another the skills needed for their survival! With instructors including Wolverine, Beast, Prodigy, Magneto and more, and a campus unlike any before seen, it’s the crossroads of the X-Universe as a student body from across the globe works to take mutantkind to the next step in their evolution – and to cope with a brewing threat to all of their number!