Action Comics (1938-) #321

“SUPERMAN--WEAKEST MAN IN THE WORLD!” Superman is stranded by super-villains on a red-sun world where he has no powers…but the inhabitants do! Plus, “THE ENEMY SUPERGIRL!” Linda Danvers uses red Kryptonite to produce vulnerability in her arm so that she can donate blood. However, a friend of hers, Debbie Porter, sustains a head injury in a car crash. What effects will Supergirl’s blood have on her friend?