Thunderous Echoes

You target a creature and overload its auditory system, causing it to be wracked in pain from loud, thunderous noises that make its ears ring. The target must make a Constitution saving throw. On a failed save, it takes 3d8 thunder damage and becomes deafened. The creature can repeat the saving throw at the end of each of its turns to try and no longer be deafened. On a successful save, the target takes half as much damage and is not deafened. A deafened creature automatically succeeds on the save when the spell is first cast.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d8 for each slot level above 2nd.