The episode also reunites Dean with one of his favorite supernatural foes: the fairy. The boys learn that a fairy (Tiffany Dupont) is responsible for the tragedies in the LARPing community, but she's not harming people of her own free will. She's got a master, and unless they find the puppeteer, there are bound to be more deaths. This is just a guess, but we're guessing it's the dude with the animal skull for a face.
I will not live to see this air. Dean's costume has killed me. Mourn not for me, my friends.