Thunder Call

At 3rd level, the thundercaller can use her performance to unleash a deafening peal of thunder, blasting an area in a 10-foot range with a tremendous cacophony. Every creature in the area takes 1d8 points of sonic damage and must succeed at a Fortitude save to avoid being stunned for 1 round. Creatures that cannot hear are not stunned but are still damaged. At 7th level, the sonic damage that is dealt by this blast of sound increases to 3d8. This damage further increases to 5d8 at 11th level, 7d8 at 15th level, and 9d8 at 19th level.