Uncanny X-Men Vol.1 #139
Kitty Pryde joins the team and soon finds she live to regret her decision. Meanwhile, Wolverine and Nightcrawler head to Canada and come face-to-face with one of the deadliest killers in the Marvel Universe. Featuring a flashback cameo from Incredible Hulk (Vol. 1) #181 when Wolverine battled the Hulk and Wendigo.
Printed: Nov 1980
Writers: Chris Clairemont and John Byrne
Art: John Byrne and Terry Austin
Cover: John Byrne and Terry Austin