Fernier Greyback's last kill is a fifteen year old girl. She pisses him off when the battle resumes, blasts him away from an older girl he had been wrestling with. He is on her before she can react, lifting her up by her hair and ripping into her throat. She can't scream, she just gurgles and he tosses her out of the window closest to him in disgust.
Someone is screaming though. The other girl, the older one, tries to run around him to the window, as though she can save the girl he just threw. He shoves her in the chest and she flies into a suit of armor and slides to the floor. She is wandless, he already disarmed her, and pretty. Fernier licks his lips, he can take his time with her, now that the other one is gone. She is motionless against the wall. He tries to scare her and lunges at her.
She moves impossibly quickly. One moment she was huddled against the wall, the next, her arm is extended in front of her, her hand grasping the sword from the suit of armor. Fernier impales himself, the blade slicing through his neck easily. His surprised brown eyes meet her tear-filled blue ones.
She drops the sword, picks up her wand and flees down the stairs. Fernier drops to the ground, hands grasping at his throat. He chokes, gurgles, and dies, his own blood filling his lungs.