Taylor's Horrific Feedback

The ground beneath you cracks as you unleash an abhorrent wail of discordant, agonizing noise from the depths of oblivion which terrorizes all creatures caught in the fallout. Each creature within 90 feet of you must succeed on a Constitution saving throw. On a failed save, a creature takes 8d20 thunder damage and becomes deafened for 5 minutes. A creature who succeeds on the saving throw takes half damage and is only deafened until the end of their next turn. If a creature is already deafened, they cannot be targeted by this spell.

While a creature is deafened in this way, they take an additional 3d10 psychic damage at the beginning of each of their turns.