This coin bears a golden sun with two feathers on one side, and a silver wing containing three stars and a crescent moon on the other. You can use an action to flip the coin in the air. If it lands with the sun up, then the coin casts the spell Daylight (3rd level) upon itself. If it lands with the wing up, then it casts the spell Darkness (3rd level) upon itself.  The coin can't be used this way again until after a short rest.