The Following Nightmare

One night Jen had a nightmare about this monster who had been trying to kill him. But now he can't escape his nightmare and the only way is to kill it. If he dies, he keeps on having the nightmare over and over again which he can't wake up from. If he can't kill the monster he can't escape his nightmare and will never ever wake up. How will he kill it? I used the FNAF Character, nightmare marionette, in this story.