Marvel Released December 1999

Uncanny X-Men #375

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Published December 1999
Cover Price $2.99
Pages 48

"I Am Not Now, Nor Have I Ever Been..." Xavier sends the X-Men on a wild mind trip pitting teammate against teammate to find out where all loyalties lie; The recently deceased Wolverine is really a Skrull and has been since X-Men Vol 2 #90.