He's taken many lives before, so why couldn't he now? You were on the ground, trembling from bleeding & pain. He felt..Hurt. It seemed almost impossible for the puppet, but he did somehow. He used you to get the electro gnosis. There was no need for you anymore. Yet, why couldn't he bring the blade down onto you to end your suffering? The sword was raised above his head, he himself was shaking ever so slightly.

"..Why?" He uttered, looking down at you. Was he..Attached? No. He couldn't.