Cauldron of Blood (also known as Blind Man's Bluff) is a 1971 horror film filmed in Spain and directed by . It stars Boris Karloff and Viveca Lindfors. The original Spanish release title was El Coleccionista de cadáveres (The Corpse Collector). The film was made in 1967, but was released after the death of star Karloff in 1971. Karloff plays a blind sculptor, Charles Badulescu, who uses the bones of real people to create works of art.