((By the power of extensive research))
Weiss smiles, before the Black Blood disappears completely. Instead, as she holds out her hand, Myrtenaster appears to appear from nothing. She smiles faintly, moving into stance, holding her sword out in front of her in what looks like a fencing position. "Hello." With her astounding speed, Weiss shoots forward, executing multiple slices at you by jumping off of sigils that appear in midair, shooting back and forth to execute a powerful blow each time she shoots past you. Her form and skill, as well as her abilities, are exactly that of Weiss.