The Serpent Stone (Skyrim)

Effect
The Serpent Stone grants the Dragonborn the ability to turn his pen1s into a serpent and fight for him. The serpent then performs temporary paralysis on the opponent.

Location
The stone can be found on Serpentstone Isle, north of Windhelm and east of Winterhold. Galmar Stone-Fist sends the Dragonborn here to initiate them into the Stormcloaks. Upon arriving, the Dragonborn must slay an Ice Wraith.

Quests

 * Joining the Stormcloaks