System: When the Garou successfully hits an opponent and activates the Hammer, the fetish unleashes a crackling bolt of energy which does an amount of damage equal to the damage dealt before soaking -- this extra damage cannot be soaked. For example, if the damage roll on the Hammer shows 3 successes, the opponent will suffer this damage, soaking normally, and also three extra Health Levels which cannot be soaked -- this damage is never aggravated and will heal at a rate of 1 box an hour. This damage can obviously render a target unconscious but can never kill an opponent and will never cause a Battle-Scar (although the normal damage can easily do either). The Stun-Hammer is difficulty 5 to wield and does Strength + 1 damage.
Spirit: A spirit of War or Electricity is used for this fetish.