THE MAN OF STEEL VS. EARTH'S MIGHTIEST MORTAL! When the immortal Martian wizard Karmang seeks to resurrect his long-dead race, he enlists Black Adam and the Quarrmer to capture the energy required--by annihilating Earth-One and Earth-S! To keep Superman and Captain Marvel from interfering with this plan, the two champions are set against one another. Now it's the Man of Steel versus the World's Mightiest Mortal--with the fate of two worlds in the balance!