((continuing from, surprisingly enough, the area with rock formation and first half of Magical force field (etc) ))
Darien's eyes snapped open, adjusting sharply to the room. Instinctively, he flexed his fingers. Finding that he was not bound, he leapt onto his feet in a heartbeat. If his heart did beat that is.
His back against a corner of the room, he surveyed it carefully. The Slayer lay, apparently not yet awake. He slipped a hand into his inside pocket and withdrew his wand. Now would be the perfect time to kill her, but something compelled him to wait. Not kill her. Destroy her. Her death meant murder, which meant revenge was needed. If he wanted to destroy the Casillases, he would have to do better than that. Like, making her one of them, his consort or slave, something like that.
Now that, he decided, was evil enough. Silently, watching her intently, he swept out of the room and shut the door, tapping it lightly with his wand, previously hidden in an inner pocket. The lock turned noiselessly. How useful. As he strolled down the corridor, he glanced back and realised he needn't have bothered. The room seemed to have already vanished. What a shame.