As an action, you clap your hands together to create a burst of thunderous sound that can be heard up to 30 meters away. Each creature within 1.5 meters of you must make a Fortitude saving throw.
On a failed save, a creature takes 1d4 concussion damage.
On a successful save, a creature takes half as much damage.
This spell’s damage increases by 1d4 when you reach 5th level (2d4), 9th level (3d4), 13th level (4d4), and 17th level (5d4).