Boomburst

You imbue your instrument of choice with magic and strum it harshly. The sound it creates is painfully loud, and emits from you like a shockwave, destroying everything in its path. Each creature in a 60-foot-radius sphere centered on your instrument must make a Constitution saving throw. Creatures take 8d4 thunder damage on a failed save and become deafened for 2 minutes, and take half as much damage on a success without any other downsides. As the caster, you have advantage on this save.

Creatures made of crystal or glass have disadvantage on their saving throw, and take an additional 3d4 thunder damage regardless of if they succeed or not. Any deaf creatures, or creatures with protection against thunder damage, that are caught in this spell take half damage on a failed save, and no damage on a success.

Any weak walls in a 20-foot-radius sphere around you are knocked down, and any unprotected nonmagical crystal or glass objects in the spell's radius instantly shatter. The spell emits a thunderous screech audible out to 300 feet.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d4 and the area of effect gains an additional 10 feet for each slot level above 3rd.