Cauldron of Blood (also known as Blind Man's Buff) is a 1971 horror film filmed in Spain and directed by Edward Mann. It stars Boris Karloff and Viveca Lindfors. This is a Spanish horror film filmed in 1967 but released after its stars death in 1971. Karloff plays a blind sculptor, Charles Badulescu, who uses the bones of real people in the creation of his art. It was released on VHS and region 0 DVD in the United Kingdom and included the episode The Silver Curtain from Karloff's 1954 TV series Colonel March of Scotland Yard.