Silver Bolt

A silver bullet in the literal sense. The base mode is unglamorous by design: four mana all told (one to cast, three to activate) for three damage to a creature, a rate no color would pay for on its own. The point is the rider. Any Werewolf caught in that three damage is destroyed outright, no matter how large the moon has made it, and no matter how much toughness the transformed side carries. This is colorless hate in the oldest tradition of the type, the conditional guarantee against a single creature type that shows up whenever a set leans on one tribe as its top-end threat. The generosity of the anti-Werewolf clause is exactly what keeps the base mode weak: a deck that has to answer a specific enemy will pay the premium, and a deck that does not will leave this in the binder. Two design details matter. It carries no timing restriction, so the sacrifice can happen at instant speed, in response to a transform or an attack, rather than waiting for a main phase. And because the artifact sits on the battlefield before it fires, it telegraphs its own presence across the table: a Werewolf pilot can read the loaded answer and decide whether to commit the big turn into a known kill.