As two actions, a rolling clap of thunder appears in a sphere centered on a point within 36 meters. The sphere spreads around corners. It lasts for the duration.
A creature that enters the spell’s area for the first time on a turn or starts its turn there must make a Fortitude saving throw.
On a failed save, a creature takes 4d4 concussion damage and is deafened for 1 minute.
On a successful save, a creature takes half as much damage.
The sphere moves 3 meters directly away from you in a direction that you choose at the start of each of your turns.
You can increase the damage by 1d4 for each additional mana or psi expended.