Action Comics (1938-2011) #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?