Discover how Supergirl's bizarre first kiss with Poison Ivy unveiled her immunity to synthetic Kryptonite, a power even Superman lacks.

Corben became extremely powerful after being saved, as he became an agent for Cadmus, using his Kryptonite-induced powers to fight Supergirl and her cousin Superman in Supergirl Season 2. His ...

Supergirl (2025) #3 just reintroduced Satan Girl with the use of Black Kryptonite, which not only brings her back into continuity, but makes her one of Supergirl’s most dangerous villains.

But then, most died on the planet from kryptonite poisoning. Ultimately, this city was also destroyed by a meteor shower. At this point, Kara’s father sent her away minutes before their world ended.