ACTION COMICS (1938) #786

Superman is kidnapped by aliens seeking his aid against the threat of a newly revamped Kanjar Ro. There’s only one problem: the planet is under a red sun. Red. After defeating Iconoklash, a woman teleports Superman to B’Dartha, which unfortunately for Superman, has a red sun. The planet Superman is teleported to is ruled by an evil tyrant Kanjar Ro, who enslaved the people while feeding off their spirits. Can a weakened Superman defeat this foe?