Black Magic is Not a Myth in Articles by Aleister Crowley.

“The ceremony is a parody of the orthodox Mass, with blasphemous interpolations.” [via, also]

Consider also:

  1. “My enemies say that the celebration of the ‘Black Mass’ was one of the most innocuous of my activities in Sicily and in France.”
  2. “The priest must be careful, however, to consecrate the Host in the orthodox manner. The wine has been adulterated with magical drugs like deadly nightshade and vervain, but the priest must convert it into the blood of Christ.”
  3. “There are many ways of abusing the Sacrament. One of the best known of which is the ‘Mass of Saint Secaire,’ the purpose of which is to cause an enemy to wither away.”
  4. “A renegade priest gathers about him a congregation of sensation-hunters and religious fanatics; then only can the ceremonies of profanation be of extended black magical effect.”
  5. The Emissary