You can howl with a high-pitched, piercing scream that deafens those nearby.
Benefit
Once per day you can emit a piercing howl, which can be heard at a range of up to 10 miles, though its most dangerous effects are much more limited. All creatures within 100 feet with the ability to hear must make a Reflex save (DC 12 + your Con modifier) or be deafened for 1d10 minutes.
Furthermore, as a result of the intense sonic vibrations caused by the piercing howl, any crystal, glass, ceramic, or porcelain objects within 10 feet are affected as though by a shatter spell's area attack (use 1/2 your Hit Dice as your caster level).