The shriekbat emits a powerful burst of sound in a 30-foot cone. Each creature in that area must make a DC 16 Constitution saving throw, taking 42 (12d6) thunder damage on a failed save, or half as much damage on a successful one. If the saving throw fails by 5 or more, the target is also stunned for 1 minute. A stunned creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.