Astonishing X-Men, Vol. 3 TP #2 (2006)

Dangerous
A 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?
Release Date: 2006