The almighty metal

When raging You start shredding a song on breaking the lute.  Each creature in a 20-foot-radius sphere centered on you must make a Dexterity saving throw. A target takes 8d6 thunder damage on a failed save, or half as much damage on a successful one.

The thunder spreads around corners. Creatures failing the saving throw are deafened until the end of there next turn

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.