X-Men, Vol. 1 #166A (2005)

Golgotha, Part 1: And What Dark Beast
"Golgotha" Part 1 (of 5) A great big Marvel welcome to new writer Peter Milligan! The X-Men travel to Antarctica to respond to an S.O.S. from a colony of mutants... and what they find is far more shocking than they expected! Will the X-Men share the colony's gruesome fate?
Release Date: 2005