The Jade Avatar
This +1 elven curved blade made by a Tian blacksmith makes a shrill whistling sound whenever it is used in combat. Once per day as a standard action, the wielder of Dancing Wasp can whirl the
weapon above his head and gain 1d4 sonic damage on his next strike with the weapon. If he whirls it as a full-round action he will gain the sonic damage for a maximum of 5 rounds once per day.