It doesn't knock her out. Of course, they wouldn't be so lucky that Shura could knock Billie out before she did much harm to herself or to Shura. It gives Shura the chance to focus, ice crystals beginning to form on the edge of her blade.

But damn, Billie's fast, and though Shura knows it, she's not used to fighting someone who knows how to teleport like this, let alone a were-someone. Her reaction is off, just a half-second too slow. She feels claws tearing into her side as she pivots. And that is definitely a very unpleasant burning sensation. Shura yells. Fine, she was done with playing with her. Fang comes down on Billie's shoulder, a blast of cold air before the blade follows.