Supergirl (Supergirl Vol. 8 #15)

SUPERGIRL VS. BLACK FLAME! As Supergirl starts to gain the upper hand, Black Flame spots an opportunity to escape Kandor and bring the fight to Earth. Powered by the yellow sun, this Kandorian rebel could be unstoppable. It's now up to Supergirl to rein her in before the entire planet ends up in danger!