Sebas ki heal

Healing abilities could even help someone who had all their limbs severed. In
fact, Sebas could use Ki to heal just about any form of physical injury. The truth
was that if he had not been worried about emergencies or the truth getting out,
he could have healed the old lady’s twisted ankle on the spot.
That said, while his Ki could heal physical injuries, it could not help with
poisoning or diseases as well, because Sebas had not learned those skills.

- Overlord; Vol 5; Chapter 3