You summon a column of rumbling, thumping bass sounds in a 60-foot-tall cylinder with a 30-foot radius centered on a point you choose within range that lasts until the spell ends. The area must be oriented vertically, and the sound this spell generates can be heard clearly for up to a mile away.

Until the spell ends, on each of your turns, you can use an action to strengthen the spell with your magic. If you do, the radius of the area grows by 10 feet for the duration. This cannot extend the radius beyond 60 feet.

At the end of each of your turns while the spell lasts, the sound pulses loudly, and each creature in the area must make a Constitution saving throw. On a failed saving throw, a creature takes 3d6 thunder damage, or 6d6 thunder damage if you cast the spell or used your action to strengthen it this turn. On a successful saving throw, a creature takes half damage.