You can channel chthonic akasha to enhance your rage.
Prerequisites
Constitution 13 or veilweaver level 1, Rage special ability.
Benefit
You can invest essence into this feat.
When raging, you gain an insight bonus equal to the invested essence on the ability score and save bonuses from your rage. Normally, this gives a bonus to Strength, Constitution, and Will saves.
You gain 1 point of essence.