Grüne Leuchte #12/1980

In "Schlachtfeld OA!", Hal Jordan returns to Earth only to face a sudden attack by a transformed shark—only to discover the truth behind the creature’s origin. With the Quard’s teleporter now active, the alien warriors have seized the Guardians and imprisoned them in the Central Battery, turning their power source into a weapon. Hal Jordan follows a Quard warrior into their hidden stronghold, where he must confront the dire threat before the Guardians’ energy is weaponized. Written by Denny O'Neil, with art by Joe Staton, inks by Frank McLaughlin, and colors by Anthony Tollin, this 1980 issue features a striking cover by Dick Giordano.