10 Most Powerful Batman Villains

5. Poison Ivy

When it comes to superpowers, though, there isn't really anybody who can rival Poison Ivy in Batman's main ensemble of antagonists. The thing with everybody else on the list thus far is that Batman can usually figure out some way to beat them.

He has fail safes, gadgets, strategies to deal with Killer Croc's bulk, Clayface's transformations, and Mr Freeze's chilly reception. When it comes to Ivy, though, he's usually pretty lost. In most decent versions of the character she's barely even a villian, just an uber-environmentalist who can't stand anything happening to her precious plants, and will, admittedly,“ sometimes go to some extreme lengths to ensure their safety. Which she does by having control over, like, all plant life.

Do you know how much of the Earth is plant life? Like, a lot. And she can even synthesise her own kinds of plants to do her bidding. Poison Ivy is essentially an evil Swamp Thing, a guy who Batman knows not to mess with.