Source: Taldor, the First Empire, pg(s). 56
Baetriovs are unique vampires who store their false youth and immortality in a pool of humanoid blood. They must constantly keep the pool fresh with blood from new victims so they remain young, handsome, and immune to undead detectors, and baetriovs usually gather cults of personality for this purpose.
- Countess Elizabeth Bathory (Real-life historical figure) on Wikipedia