Mordenkainen's Lost Notebook

Resounding Thunder

4-level Evocation

Waves of sound crash continuously upon the ears of those in the area of a 20-foot radius, 40-foot high cylinder centered on a point you can see within range. When a creature enters the spell’s area for the first time on a turn or starts its turn there, it is engulfed in a punishingly-loud cacophony that causes searing pain, and it must make a Constitution saving throw. On a failed save, a creature takes 4d6 thunder damage and is deafened. On a successful save, a creature takes half damage and is not deafened.
At higher levels: At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d6 for each slot level above 4th.