You can channel chthonic akasha to enhance your precision-based damage.
Prerequisites
Constitution 13 or veilweaver level 1, a precision damage ability (such as sneak attack).
Benefit
You can invest essence into this feat.
You gain an insight bonus equal to twice the invested essence on all damage rolls when dealing precision damage. This is considered precision damage and is not multiplied on a critical hit.
You gain 1 point of essence.