The X-Men #121

Canada's premier super-team comes out swinging in this 1979 Marvel clash, as the cover — penciled by Dave Cockrum and inked by Terry Austin — explodes with Alpha Flight in full assault against the X-Men. Northstar streaks forward firing energy blasts, the massive Sasquatch looms in the center of the fray, Storm swoops through the chaos in the background, and Cyclops braces himself in the thick of it all, while the cover copy makes the stakes clear: the X-Men are fighting to keep Wolverine out of Alpha Flight's hands. With Chris Claremont and John Byrne at the helm and a story titled "Shoot-Out at the Stampede!," this issue delivers exactly the kind of superhero-vs.-superhero tension that made Uncanny X-Men appointment reading in 1979.