You have made a pact with a powerful undead being. Since before history began, vampires, liches, death knights, and their god-like masters have struck bargains with mortal servitors, who manage their earthly affairs and keep meddlers from prying.
Within your veins lies the darkest and most dangerous form of magic. Blood is a powerful arcane channeler. Only the foolish or the very wise tamper with it as a component, and those who do often suffer as much as they excel.
