No tribe loathes the blight of vampires more than the Silent Striders. By using this Gift, a Strider may block the flow of blood in a vampire's veins, preventing him from useing any supernatural powers tied to the blood. This Gift is taught by Cobra-spirits, who resent being viewed as a symbol of Set.
This Gift can only be used on a supernatural creature with a Blood Pool who gains power from that blood (vampires, ghouls, etc. -- even Ananasi). The Garou spends a Gnosis point and rolls Manipulation+Medicine (difficulty of the target's Willpower). Each success prevents the target from spending any Blood Points, for whatever purpose, for a full turn. A Garou may only use this Gift once per scene against a given target, but multiple Garou may use this Gift on a target once each. Strider Packs armed with this gift are among the fiercest Leech-slayers known to the Garou.