Collects Uncanny X-Men #450-454. The X-Men investigate a series of mysterious murders in New York City. All the victims seem to have been cut to pieces by blades... Adamantium blades! But if Wolverine didn't murder these people, then who did?! Plus: While on assignment to track down missing teammate Sage, the X-Men discover more than they bargained for: the birth of a newer and deadlier Hellfire Club!