You can channel divinity to imbue yourself with additional essence.
Prerequisites
Constitution 13, Charisma 13, channel divinity class feature.
Benefit
You can spend a use of channel divinity as a free action to add 1 point of temporary essence to your essence pool for 1 round. For the duration of this effect, your essence capacity in all veils and other akashic receptacles is increased by 1; however, you cannot invest this essence into any receptacle which binds essence into it.
You can use this ability once per round.