To be a Vamp you need to suck blood to regenerate your cells so you can live forever. If there is no human to suck his blood you will need to suck some animals blood like rat or dog or cat or cow.
And not to mention you cant come out to light .
And the high destiny of the individual is to serve rather than to rule, or to impose himself in any other way.
If A equals success, then the formula is: A = X + Y + Z, X is work. Y is play. Z is keep your mouth shut.