"It has taken someone's head off," she says with a wicked grin, half to mess with him and half because it's the truth. She's never tested it on someone like Billy, but how different could he be, really? She's sliced a Greater Demon with this thing and not much is tougher than that.

Isabelle curls the whip again, lets it settle against her skin and glamour into a bracelet again. "Easy to hide, too. Just like your magic cave."