Superman and Manhunter from Mars star in "The Key That Unlocked Chaos!" First appearance of Mongul. Written by Len Wein, with art by Jim Starlin, Dick Giordano and Frank McLaughlin. Characters: Superman; Martian Manhunter [J'onn J'onzz, Manhunter from Mars]; Mongul (intro, villain); Steve Lombard; Jimmy Olsen; Lois Lane; The Warzoon (aliens, flashback); The Largas (aliens, flashback); green kryptonite. Plus: "Whatever Happened to Congorilla?" Written by Bob Rozakis, with art by Romeo Tanghal and Frank Chiaramonte. Characters: Congo Bill; Congorilla; Golden Gorilla; Janu; Mose; K'Bani (villain); Fred Cantrell (villain). Cover by Jim Starlin. Cover price $0.50.