Blast Beat

You begin a relentless performance punctuated by rapid bursts of pure sound.

When you cast this spell, and whenever you cast another spell with a Verbal component while maintaining Concentration on this spell, a blast of sound erupts from you in a 10-foot Emanation.

Creatures of your choice in the Emanation must make a Constitution saving throw:

• On a failed save, a creature takes 2d8 Thunder damage.
• On a successful save, it takes half as much damage.

A creature can take damage from this spell only once per turn.