Halloween marks the end of our Supernatural/Horror themed week. Now it's your turn to rec us your favorite scary/creepy fics!

Things to keep in mind:
-Recced stories can be any length, any fandom, and any pairing, as long as they fit the theme
-You don't need to write a review (unless you want to). All that you need to include are title, author, and link to the story (all parts if there are more than one).
-Stories as a single file are preferred, if available.

Today's Topic: Supernatural/Horror

Previous RR topics can be found here.