All New Collectors' Edition #C-58

In "When Earths Collide!", the immortal Martian wizard Karmang unleashes a cosmic threat that threatens to merge Superman’s Earth with Captain Marvel’s, driven by a desperate bid to free his imprisoned people and end his own torment. With Black Adam and the Quarrmer aiding his scheme, the Man of Steel and the Marvel Family are forced into a clash that could destroy both worlds—until Supergirl and Mary Marvel step in to turn the tide. Written by Gerry Conway and brought to life by Rich Buckler’s dynamic art, Dick Giordano’s inks, Adrienne Roy’s colors, and Gaspar Saladino’s lettering, this 1978 DC classic features a cover by Buckler and Giordano that captures the epic scale of the collision.