Healing Factor+Pain Siphon
Another ability related to being able to heal is to siphon from someone else. A supernatural's veins will fill with black liquid when they activate and utilize this power. The being siphoning the pain will absorb, relieve the pain present in the victim's body, but not the cause of the pain.
Two creatures known to have this power are the werewolf and a kitsune of the type void. An Alpha is able to use this ability, with a cost, to bestow healing.