Blood of my enemies

Pre-reqs: Blood Hunter

Once per long rest you may capture the latent magical powers within a recently (10mins) deceased creature. This is performed as a 1 minute long ritual. You harness your hemocraft die + Intelligence modifier in health from the creature. The total can not exceed the creatures maximum hit points minus 2. You store this health as essence in a vial and can hold no more than your intelligence modifier at a time. The essence does NOT count as temporary hit points and it looses it's effects after a number of weeks equal to your intelligence modifier. You are bound to this essence rendering it useless to any other blood hunters or for other ritual purposes.

Once when you roll damage using your hemocraft die you may subtract the damage dealt from the essence rather than your hit points. Any excess damage is subtracted from your hit points or another vial of essence if one is available.