Thunder Clap

You slam your hands together to unleash a deafening blast. Creatures in a 15-foot area cone take scaling d6 sonic damage, with a 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 as your hands recover from the thunderous vibrations.

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