Lucifer's Women (1974)

An acclaimed author has developed an interest in Satanism and black magic. Hoping to manipulate him in order to satisfy his own perverse desires, his publisher convinces him to perform the ultimate black rite: a human sacrifice. Selecting a beautiful female burlesque dancer to be their victim, the author begins having doubts about his beliefs as, at the same time, his publisher becomes more and more obsessed with the black arts and murder.