The Super-Heroes #23

In "O, Bitter Victory!", the X-Men journey to the Savage Land under Xavier’s reluctant approval, despite not being mutants themselves, to investigate the legendary Ka-Zar. When Jean and Warren are captured by the savage Swamp Men, the team must act fast to prevent a deadly ritual—before the jungle’s ancient secrets claim more lives. Written by Stan Lee and illustrated by Jack Kirby, with inks by Chic Stone and letters by Sam Rosen, the cover by Howard Chaykin and Al Milgrom captures the tension of a lost expedition in a forgotten world.