A Bunk is a price to be paid or an action done to effect a Cantrip among the Fae. For the Kithain, these Bunks must be new each time, as befits the dynamic nature of Faerie magic. Certain types of Faerie Arts need particular types of Bunks. The Bunk that allows a Sluagh to peer into the future with Soothsay would not be effective as a Bunk that allows a Troll to create a protective armor of bark around their body with Primal.