As someone said, the writers. But if you're being serious, then I'd say Wonder Woman, Xanadu perhaps, Zatanna, Dr. Fate, uh yeah basically those with magic and god-like powers. And I'm well aware that he used Zatanna's left hand as a weapon but as I've said before, they depower her a lot. Also, if Perpetua wasn't stupid to trust him, she could defeat him.
