Life steal was a very advanced form of Dark magic. The immediate feeding and healing of the bodies are only present among the highest-ranking vampires and other beings. Low leveled vampires wouldn't have such strong ability. Though vampires do heal through the absorption of Dark energy and blood, it wasn't as fast as Kyros's exaggerated effects.
The strange thing was that the healing came directly from the sword. The blood was clearly rising from the sword hilt, and the blood rushed up to the arm of Kyros, which in turn was used to heal the wound.
"You will all be fuel for my sword!" Kyros made a sadistic laugh.
[Taunt activated.]
"Stop it now! Before it heals itself!" The woman cried out and immediately retrieved a bow and began to fire.
Kyros was standing near a torch, and when he moved out of the light, he activated Dark Cloak and disappeared.
The arrows missed, and it exploded upon contact on the wall behind.