Superman #18/1972

In a mysterious, shifting structure that appears and vanishes without warning, Superman confronts a disoriented J'onn J'onzz — the Martian Manhunter — who claims to be a hunter of men. As the two grapple with the truth behind the enigmatic building, J'onn reveals a haunting tale of Mars's fall and the cruel exploitation of its people.

In a moment of crisis long ago, Krypton faced invasion, and its people relied on cunning and courage to drive back the aggressors. When a young warrior named Dug-Les was left behind, the furious crowd demanded his life—but Sak-Kar, the leader, made them face a chilling truth. The fate of their world now hangs in the balance of a single decision.