As a measure meant to protect citizens against werewolves and other hunters of the night, the law states that commoners of Kessig out after dark must wear an amulet of blessed silver. The amulets were crafted and blessed in the High City of Thraben, and have a potent effect against lycanthropes. But they are in limited supply, and some priests have quietly begun giving them out preferentially, in exchange for favors or promises of protection. Since the Curfew of Silver, relations between Kessig and Gavony have worsened.

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PLANESWALKER'S GUIDE TO INNISTRAD: KESSIG AND WEREWOLVES