ASTONISHING X-MEN [2004] #7
Creators
Story by Joss Whedon. Art and cover by John Cassaday.
Publisher: MARVEL
Description
DANGEROUS' PART 1 (OF 6). A tragic death at the school reveals a powerful enemy living among the X-Men that they could never have suspected--and no, it's not Magneto. Seriously, if you're not reading this...well, you're the only one!