Werewolf the Apocalypse Rage Across St. Louis
A single, long blow on this whistle will summon a freezing cold wind, laced with snow. It will cover the tracks of the werewolf using the whistle, and his pack if appropriate, while chilling the bones of any pursuers, costing them one die from every roll while they continue to pursue the owner of the wind whistle. The effects of the whistle last for one hour.
To create a wind whistle, a wind elemental must be bound into a whistle carved from the bone of an animal that died of the cold during the winter months.