vampirism

noun4

1. •
   The state of being a vampire.
2. •
   Practices associated with vampires, in particular blood-drinking and the draining of a victim's life-force.
3. •
   (figurative) Extortion.

   • Treason, delusion, vampyrism, scoundrelism, from Dan to Beersheba! — 1837
4. •
   Systemic lupus erythematosus (autoimmune disease)