An evil sorcerer from the far-distant planet Y'bar who is able, by means of a "strange crystal" in his possession, to summon instantaneously from distant planets awesome weapons and creatures which he can force to do his bidding. Zerno arrives on Earth in August 1962, determined to "loot and plunder" the planet and to accumulate a large supply of bronze, a metal with the power to rob all inhabitants of Y'bar "completely of [their] physical and mental strength," so that, once back on his native planet, he can "gain complete control over [his] people." Zerno and his henchman Sborg are ultimately defeated through the heroic efforts of Batman, Robin, and Superman (WF No. 127: "The Sorcerer from the Stars!").