Superman Official Annual #1983
In "The Key That Unlocked Chaos!", Superman and Supergirl face their greatest challenge yet when Mongul seizes control of Warworld’s arsenal, turning the deadly planet into a weapon of mass destruction. With the fate of the universe hanging in the balance, the duo must survive the onslaught—only to discover a chilling mystery: Mongul himself is nowhere to be found. Written by Len Wein and brought to life by Jim Starlin’s bold art, Romeo Tanghal’s inks, Jerry Serpe’s colors, and Ben Oda’s lettering, this 1983 annual features a striking cover by Brian Bolland.
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Mongul has gained control of the weaponry of Warworld. Superman and Supergirl manage to wreck the world, but cannot find what should have been the unconscious Mongul.
Plot details indexed by the Grand Comics Database (CC BY-SA).