He gave the creature a kick, removing the creature from the roof, and then jumping down to goomba stomp the undead bat thing. He figured having its brain matter squished and scattered over a large area would have a detrimental effect on its ability to both continue attacking, and report back in, so it wasn't a bad idea. Once down, he cut off the arms with well placed swipes, rendering the creature 'harmless' at least from a standpoint of physically attacking something, before removing the bits and pieces from the stable yard, and dumping them in an open area behind the inn. He piled them together, and then set the mess on fire, glad the area was cleared, as he headed back inside. A disposable creature like that was bound to be a distraction, and he wanted to make sure something hadn't slipped into the inn behind him.