Sonic Wave

Evocation cantrip
Casting Time: 1 action
Range: Self (5-foot radius)
Components: S, M (a musical instrument worth at least 1 gp)
Duration: Instantaneous
Classes: Bard (College of Rock)

You play a musical instrument that you are proficient with, and each enemy creature in a 5-foot radius must make a Constitution saving throw. A creature takes 1d4 thunder damage and gains the stunned condition until the start of their next turn on a failed save, or half as much damage on a successful one. Creatures that cannot hear are immune to this effect.

At Higher Levels: At 5th level, the damage increases to 2d4 and the range improves to a 10-foot radius. At 11th level, the damage increases to 3d4 and the range improves to a 20-foot radius. At 17th level, the damage increases to 4d4 and the range improves to a 30-foot radius.