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(W) Joss Whedon (A/CA) John CassadayA tragic death at the Xavier Institute reveals a powerful enemy living among the X-Men that they could never have suspected – and no, it’s not Magneto. Things heat up in a way none of the X-Men ever dreamed, but will teamwork save the day when they can’t even depend on themselves? Collects ASTONISHING X-MEN #7-12.