Nodding at Kiera, Tristan pulls his blade once more. In a deft motion, he reverses his grip on the sword and brings the pommel down on the back of the creature's head in an attempt to knock it unconcious. Then he starts using his rope to bind the hands, feet and wings of the creature.
[ooc - coup-de-grace subdual? Yeah, probably not. Rules are up to you Ashy, he'll work on the binding whether or not he's successful.]