The Joker smirked some, keeping his eyes on the green woman. She was going to be dangerous and hard to take down. But he was prepared for it. Backing to the dais, Joker pulled out a small sapling. He tore it from it's root holder then pulled a knife out. Grinning, he sliced the sapling with his knife, hoping it would piss off Ivy. When a person was angry they were more likely to make mistakes. And even if this didn't work, this particular warehouse was set up as one giant trap.
"So Ivy, how are you going to kill me?" he asked, grinning sadistically as he kept slicing the plant to ribbons. Oh yes, Ivy was going to pay dearly from keeping Harley from him. "Oh, and what are you going to do with all my hidden Joker Toxin spread throughout the city that will blow unless I enter the correct keycode?" His eyes glinted dangerously. "Oh, and all that toxin is deadly. My most potent batch."