"Why should I?" A laugh escaped her as he struggled, just as so many others she'd trapped in the past. His anger was delicious, invigorating and up close she could feel his power, perhaps she wouldn't kill him after all. But he could struggle all he liked, he would'nt be getting...Her eyes widened as the amulet was ripped out of her back, surprise slowing her reaction as the lightsaber descended.
"Ugnnnn!" The heat from the weapon seared her cells, drawing the hiss of pain from her as her arm dropped to the ground. There was no blood on the stump of her arm, or anything that could be described as normal physiology, only a viscous blue material with the consistency of soft rubber. Taking a few rapid steps back to get her out of his reach, the stump of her arm filled out, expanding back out, gaining definition, changing colour and texture until a moment later her arm was as good as new. On the ground the old limb twitched and then melted into a blob of the same substance, slithering rapidly across the rooftop to meld with her foot.
"Are you?" She asked, flexing the fingers of her newly regrown hand and glaring. "We'll see about that." Her arm lashed out blindingly fast, the fist on the end of it swelling until it was the same size as the Jedi, throwing a stretching punch at him that he wouldn't soon forget.
The fingers of her other hand extended, shooting forward en-mass to try and wind around the hand holding the amulet, prize it from his grasp and stop the wielding of that infernal sword as well.