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Dr. Pamela Isley, also known as Poison Ivy, was a criminal and a patient at Arkham Asylum. [1]

At some point in her life Dr. Pamela Isley became the criminal bio-terrorist known as Poison Ivy. She got caught and was send to the Arkham Asylum.

She was still at the Asylum whenthe yellow rings of Parallax headed to it. Ivy was one of the few inmates who got one of the rings and was transformed into a Yellow Lantern. Together with Bane and Mister Freeze, she fought against Batman and Nightwing, who had been assisted by Superman. Later, Parallax appears behind the heroes, having John Stewart under his control.

It was Dr. Emil Hamilton who found a way to reboot the yellow rings, which deactiveted them. All former Yellow Lanterns, including Poison Ivy, fell from the sky but were saved by Superman.

After the defeat of Parallax, Ivy and the other depowered criminals were send to Arkham once more.


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Batman Villain(s)
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This character is or was a member of the Sinestro Corps, chosen by Sinestro to counteract the Green Lantern Corps and spread terror throughout their sector with a Power Ring.
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