Blood Bond

Anyone who drinks the blood of a vampire becomes progressively more attached to their donor until finally, after three drinks on three separate nights, the Bond transforms them into infatuated servants when in the donor's presence. When under a full Blood Bond, the thrall experiences an intense sense of loyalty, sometimes even infatuation or love, toward their donor. Blood Bonds can affect both mortals and vampires, and are considered among the more terrifying forms of control since the rob the thrall of free will. They can be resisted temporarily with extreme force of will. It's rumored that the Bond can be broken, but this knowledge is rare and uncertain at best.