Dissonant Chord

A chord of sonic energy that can be heard from up to 100 feet away erupts toward a creature within range.  Make a ranged spell attack against the target. On a hit, it takes 1d8 thunder damage.  If you are holding a musical instrument with which you are proficient in both hands, you may make your spell attack with Advantage. 

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