Meraudian Heresy

The Meraudian Heresy was a theory put forward by Meraud, a twelfth-century magician from Cornwall. There are various forms of this theory: all revolve around the idea that a person who has been either cured of a fatal malady, or raised from the dead, by means of magic, is no longer susceptible either to the ordinary laws of nature or to the precepts of religion. A more extreme version suggests that this person would, instead, owe allegiance to the magician who had aided him, or her, to escape Death.

Another variation of the heresy is the Northern English belief that specific kinds of murderers belong to the Raven King, rather than God or the Devil [18].