Essence of the Immortal (Akashic)

You fortify your heart and lungs with akasha, making you even more durable.

Prerequisite(s): Con 15, must have an essence pool.

Benefit(s): You gain hit points equal to twice your total essence pool. If the size of your essence pool changes, the number of hit points granted by this feat changes to match the new total.

Special: This counts as the Toughness feat for determining prerequisites.