Thunder Clap

You slam your hands together to unleash a deafening blast. Creatures in a 15-foot cone cone take (half your level (minimum 3))d6 sonic damage, with a basic Fortitude against your class DC. Creatures that critically fail their save are also Deafened for 1 minute. You can't use this ability again for 1d4 rounds as your hands recover from the thunderous vibrations.

At 8th level, and every 2 levels thereafter, the damage from Thunder Clap increases by 1d6.