"The vampyre's human supplicant, their familiars, are themselves of black hearts and evil intent, masters of trickery and deceit. Once tasting the dark blood of the vampyre, the familiar's fervent loyalty to his master knows no limit, and as such have proven to be a dangerous adversary."
An excerpt from Liber daemonum et inmortuorum, the fabled book on demonology and the history of Homo Nosferatu Vampiris, commissioned in the sixteenth century by the emperor of the Holy Roman Empire.