Sacrifice (Borderless) [Duskmourn: House of Horror Special Guests]Set: Duskmourn: House of Horror Special Guests Type: Instant Rarity: Mythic Cost: {B} As an additional cost to cast his spell, sacrifice a creature. Add an amount of B equal to the sacrifice creature's mana value. Cultists eagerly undergo the Rite of the Threshold, allowing Valgavoth to feed on their fear and bind them to the essence of the House.