Supernatural (TV series)/Recap/S03/E09 Malleus Maleficarum

Season 3, Episode 9:

Malleus Maleficarum
Sam and Dean investigate a series of deaths that turn out to be caused by a coven of witches. It is revealed that one of the witches is actually the demon to whom they sold their souls. Ruby shows up, and they use her knife to kill the demon.

Tropes

 * Big Damn Heroes: Ruby, twice.
 * Black Eyes of Evil
 * The Corrupter: The demon possessing turns a group of innocent women into witches and damns their souls to Hell,.
 * Deal With the Devil
 * Force Feeding: Ruby saves Dean's life from a curse by making him drink a potion; Dean complains that it tastes like ass.
 * Hey, It's That Guy!: Apparently, Heather Mosby is into witchcraft now.
 * Les Yay: Ruby and Tammi, . You know the scene.
 * Squick: The woman's teeth falling out in the teaser, the maggots in the burger, the dead rabbit...
 * Wicked Witch:
 * Wicked Witch: