"I won’t kill you, you’re far too precious for that," he told her. "But I need you to drink the vial. It’s going to knock you out for a few hours. The news about Potter’s death spread not only to us, You-Know-Who already knows about it too. It is only a matter of time until he attacks Hogwarts. Until that time, my job is to keep you here. We will use you to convince the High Reeve to stand back."