You play a long, droning note on a kazoo. All creatures within 10 feet of you and that can hear you must make a Constitution saving throw. On a failure, a creature takes 1d6 thunder damage at the beginning of each of your turns and cannot cast spells with verbal components for the duration. On a success, a creature takes 1d6 thunder damage and cannot cast spells with verbal components until the end of its next turn. A creature that fails the initial saving throw can make a new saving throw at the end of each of its turns to end the effect.