Concussive Chord

You release a blast of sound with your voice (verbal component) or your instrument (somatic component). Make a ranged spell attack against a creature within range. On a hit the creaturetakes 1d8 thunder damage.

The spell's damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).