From Pathfinder Adventure: Prey for Death, which isn't enabled.

Bone Flense

SPELL 3

Traditions arcane, divine, primal

Cast

Range touch

Targets 1 weapon that is either wielded by a member of the Red Mantis or is a praying mantis's leg Strike

Duration 1 minute

The target weapon becomes imbued with Achaekek's power and glows softly with crimson light akin to that shed by a candle. When a creature with a skeleton or exoskeleton takes damage from a Strike delivered by this weapon, the creature's bones nearest to the wound instantly sprout jagged, razor-sharp spurs that flense the muscle and flesh from inside out. The creature takes an additional 1d6 persistent bleed damage from the Strike. You can use the Erupting Spurs reaction.

Spell Effect: Bone Flense (Damage)

Spell Effect: Bone Flense (Reaction)

Heightened (+2) The persistent bleed damage increases by 1d6. The damage from Erupting Spurs increases by 4d6.

Pathfinder Adventure: Prey for DeathORC