Mountain Ash

Mountain Ash likely refers to the Sorbus scopulina, a small to medium-sized deciduous tree common in Northern California.

The tree, also known as Rowan, is woven throughout the folklore of many regions as a ward against evil beings.

Teen Wolf Creator Jeff Davis has called Mountain Ash “magic” but the mechanism through which it exerts power is unclear.

Mythical Properties
Within the mythology of MTV’s Teen Wolf, Mountain Ash is mainly used by Druids. It blocks and exhibits control over werewolves and other supernatural creatures.

Examples

 * Druids Ms. Morrell and Jennifer Blake throw down circles of Mountain Ash dust to create a personal shield.


 * Peter Hale could not pass while a balustrade made of the wood was down, completing the circle of Mountain Ash built into the Vet Clinic in Formality.


 * Isaac and Erica could not cross a circle of Mountain Ash powder in Raving.


 * Capsules filled with Mountain Ash powder and ingested by Gerard cause him to violently reject a werewolf bite in Master Plan.


 * Dr. Deaton says his animal clinic is lined with Mountain Ash "making it difficult for someone like Scott to cause me any trouble."


 * Sometime after Lunar Ellipse, Deaton installed Mountain Ash baseboards throughout the McCall home. Spreading Mountain Ash along front door jam completes the circle and (mostly) protects those inside from supernatural creatures.

Exceptions

 * With great effort, Scott McCall was able to cross a Mountain Ash barrier.


 * Several Oni were able to break through the barrier around the McCall home.