Counting down the Dark Knight's greatest foes!
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11. Poison Ivy
First appearance "Batman" #181 (1966)
Created by Robert Kanigher and Sheldon Moldoff
The greatest villains are the heroes of their own stories, and environmental crusader Pamela Isley could have been one of the planet's great defenders had she chosen to channel her passion into more heroic channels. Instead, she is a contagious, twisted, fevered, environmental terrorist who values the well being of a rhododendron over the value of thousands of human lives. Poison Ivy means well -- in her own twisted way -- but like an uncontrollable force of nature, she leaves destruction and pain in her wake. An avatar for the fury of Mother Nature, Poison Ivy has been tempting and plaguing the heroes of Gotham since the '60s. In recent times, thanks to her uncharacteristic loyalty and friendship with Harley Quinn, Ivy has been cast as somewhat of an anti-hero, but her unpredictable nature makes her a constant threat to any but her leafy, flowery friends. She might be Batman's most beautiful villain, but this rose has thorns and a heart of pure poison.