The source of power that vampires gain through blood sucking. It is also said to be the power of the soul that resides in the creature. For this reason, humans are targeted by vampires more than animals, both in quality and quantity. It is also used to dominate an opponent and turn him into a household member or to use special abilities. Blood sucking is an efficient way to obtain sexual energy, and if enough sexual energy is obtained, blood sucking is unnecessary.