His Kryptonite, if you could call it that, is some kind of happiness or something, the Hulk doesn't really understand. Anyway, it's pointless because he's sure as shit not happy right now. His head is getting lighter, which means she's using some of her stupid magic again, and he shakes his head to try to clear it, to get back on his game. With an outpouring of strength, he struggles to free his arm so he can swipe at her and her covering of leaves. He wants to tear it apart, and then tear her apart. So there.