As an action, you clap your hands together to create a burst of thunderous sound that can be heard up to 20 meters away. Each creature within 1 meter of you must make a Fortitude saving throw.

On a failure, it takes 1d6 concussion damage.

On a critical failure, it takes twice as much damage.

On a success, it takes half as much damage.

On a critical success, it takes no damage.

At higher levels

This spell’s damage increases by 1d6 when you reach 9th level (2d6) and 17th level (3d6).