Raven looked from Slytherin to Slytherin and they all trembled with rage. Raven shook her head and raised her hand whiling smiling. "Maybe 10-12 hours would make them not be so crank and get so mad," she said smiling. Her intenions wasn't to ruin their life but she felt threatened everytime she felt some one eyes on her. "Yes, professor the rules as you were saying."