When Hunters capture level D vampires, they tattoo them with their symbol and perform a "taming" ceremony enabling them to disable a vampire with a linked piece of jewelry. While the hunters have a ward to prevent vampires from entering their buildings, an exception is made for tamed vampires. Eventually every ex-human vampire falls to level E, and loses his or her humanity and goes mad with bloodlust. These vampires are then put on the list for extermination. However, they can be saved from this fate if the Pureblood that created them gives them their blood.