vampires' life force that allows their servant to heal more rapidly and gives them some resistance to vampiric hypnosis, the second comes in a vision of flame and allows the vampire to feed on the metabolism of their servant (when the servant eats/drinks the vampire shares the experience), the third mark involves the vampire feeding from their servant directly allowing the sharing of thoughts and memories between the two, and when the servant is forever bound by the fourth (final) mark which involves the servant drinking the vampires' blood, he/she becomes immortal. The relationship between a vampire and his or her human servant(s) is described as an intimate and eternal union of their flesh, blood, and souls. The human servant should only die when the vampire they are bound to dies, although Anita has proven that wrong on several occasions, in the third book Anita lives on as she kills the vampire she is bound to. Also, if the human servant is killed, due to physical or metaphysical force (although they cannot be poisoned or infected with a pathogen), the vampire they are tied to may die as well, unless that vampire is a sufficiently powerful master, such as Asher or Nikolaos. Anita Blake: Vampire Hunter Zombies and revenants in popular culture