First time the word Uncanny appears above X-Men but the title didn't officially become Uncanny X-Men until #142

"Desolation!" Part 1 of 3. Story by Chris Claremont and John Byrne. Art by John Byrne and Terry Austin. Beast and an unconscious Phoenix fight to stay alive in the unrelenting cold and barren wasteland of the Arctic. Meanwhile, Cyclops, Nightcrawler, Storm, Colossus, Banshee, and Wolverine find themselves lost in the land that time forgot. Can even the X-Men survive in one of the most dangerous places in all the Marvel Universe? Can they survive the Savage Land?! Note this is the issue where Colossus meets a native girl, Nereel. Who, unbeknownst to him, bears their son. They show up again later in Uncanny X-Men Annual #12. 36 pgs. Cover price $0.35.