"What happens after thirteen?" Jack asks. He's watching Owen closely, but the young man has his back turned towards them, so he doesn't notice the change in Owen's eyes.

The death entity cannot be permanently defeated, but it can be weakened. The destruction of the glove will scatter what remains of it there. The part of it in Owen has to be defeated by the host's hand once it finally emerges, if he has faith that he can succeed, and accept that he has nothing left to lose.