From the nightmarish return of Krypton to the machinations of Cyborg-Superman, Kara is thrust from one battle to another until a fight with Lobo sends her over the edge...an edge filled with rage. Will the flame be pulled from her heart or consume her forever? And what is this deep-space school called the Crucible all about? Collects Action Comics #23.1, Action Comics Annual #2, Batman/Superman #16-20, Green Lantern #28, Red Lanterns #28-34, Red Lanterns Annual #1, Superboy #25, Supergirl #21-40, Supergirl: Futures End #1, Superman #25, and a story from Secret Origins #1!