The X-Men #126

In "How Sharper Than a Serpent's Tooth...!", the X-Men face their most personal threat yet on Muir Isle, where they confront Proteus—Moira’s son and a being of terrifying power. Jean struggles with lingering visions from Mastermind’s influence, testing her resolve as the team fights a battle that feels as much emotional as it is physical. Written by Chris Claremont and brought to life by John Byrne’s dynamic art, with Terry Austin’s inks and Glynis Wein’s colors, this issue is a standout in the series’ early years. The cover by Dave Cockrum and Terry Austin captures the tension perfectly.