The X-Men #98

Announced with a bold "The Sentinels Are Back!", this April 1976 issue of The All-New, All-Different X-Men throws the mutant team headlong into battle against the towering purple-and-grey robot hunters. Dave Cockrum's cover captures the chaos beautifully — Storm's white hair streaming as she and her teammates clash with multiple Sentinels, one of whom cradles a captive X-Man in its massive fist while another takes a hit in the background. With Chris Claremont and Cockrum at the helm of this era's creative engine, X-Men #98 is a vivid snapshot of the series hitting its stride in one of Marvel's most beloved runs.