This light grey stone has a small hole where a thin rope has been looped through to create a necklace and radiates with a blue and white energy and has the engraving of moon.

While wearing this amulet, you can spend your reaction after being damaged by a creature you can see within 60 feet to force them to make a DC 15 Constitution saving throw. On failure, they take 2d6 cold damage. You may only use this ability once per dawn.