Stiles is definitely bleeding by the time he hears that heavy thud against the door. His entire face feels like one giant throbbing hurt, and the room is spinning as he jerks his head up, yelling back up the stairs. "Derek, stop! It's a--" Another blow stops him before he can finish the cliché, but that doesn't stop his sudden panic. There's two of them down here and if the others are dead that means Derek's been fighting and what if--what if--

He doesn't want to watch someone else he cares about die. He can't do that again. He'd rather he were dead. And it still doesn't occur to him that he's been expecting Derek all along, and not Scott. Scott's chosen who matters. And so has Derek.