RESISTANCE TO POISONS:
Poison Ivy's body is able to assimilate and metabolize poisons at a Monstrous level.
Botany * Seduction * Biochemistry
Gymnastics * Rock Climbing
The Injustice Gang of the World * The Secret Society of Super-Villains
Born in Seattle, Washington, of a wealthy family, Pamela Lillian Isley was early attracted to botany, which became her major at college.
Her professor, a Frenchman named Marc LeGrand, romanced her, convincing her of his intention to marry her -- as soon as he had enough money. He told her he might be able to make a fortune with a discovery based on an urn containing ancient Egyptian herbs. But only burglary could get it from a museum.
Pamela was brilliant enough to do just that. What she didn't know was that the herbs were a deadly, untraceable poison, and he slipped it into her drink when they toasted their future.
He thought he was rid of the one person who know of his part in the theft. He was wrong. Somehow, Pamela's system resisted the poison and assimilated it, making her immune to all poisons.
She then took the identity of Poison Ivy, from her interest in plants, her immunity to poison, and her initials. She committed a series of crimes so brilliant she was never even suspected.
Ivy arranged to end the careers of female criminals who took credit for her deeds, with a trick that delivered them to the law. But she also found herself face-to-face with the Batman, and her attempts to vamp him failed. She landed in jail.
Ivy prided herself on her sex appeal. When a man resisted her or double-crossed her, she never forgave him. Hence Batman is now her mortal enemy.
Ivy allied herself with The 100, accepting a contract to kill the Thorn, but failed. She also twice became a part of the Injustice Gang of the World, first when it was formed by Libra, then when it was resurrected by Abra Kadabra. And she had a short stint with the Secret Society of Super-Villains.
But though she has battled other heroes, her main foe continues to be the Batman. She has also gone after Bruce Wayne for spurning her -- unaware that he is the Batman. Once she almost pulled off a scheme to gain control of the vast assets of the Wayne Foundation.