Mordenkainen's Lost Notebook

Interminable Echo

4-level Illusion

Choose a target which can see and hear you within range. The target must make a Wisdom saving throw. On a failure, you fill the target’s mind with a barrage of sound only it can hear. For the duration, the target has disadvantage on Wisdom (Perception) checks involving hearing, and at the start of each of its turns takes 2d6 thunder damage. At the end of each of its turns, the target can attempt another Wisdom saving throw. On a success, the spell ends.