Sinew-Song
Level 17A sinew-song is an ivory violin bow that bears an odd string, one that vibrates on its own, creating the soft sound of violin music whenever it's swung through the air. When used to play a violin, this ivory bow functions normally but grants a +3 item bonus to any Performance check attempted as a result. It can also be used to mime playing a violin when no instrument is at hand, but in this case, it grants no item bonus to resulting Performance checks.
A sinew-song's primary use is as a weapon—it can be wielded as if it were a +3 keen greater thundering greater striking sickle .
Activate—Cutting Cadenza ◆◆ (manipulate, sonic)
Frequency once per day
Effect You Stride once and then swipe the weapon through the air three times. Shimmering waves of sound slice out in a 30-foot cone. All creatures in the area must attempt a DC 37 reflex save.
Critical Success The creature is unaffected.
Success The creature takes damage as if you successfully hit it with a Strike using a sinew-song , but all of the damage is sonic damage.
Failure As success, but the creature also takes 2d6 persistent bleed damage.
Critical Failure As success, but double the damage and the creature takes 4d6 persistent bleed damage.