Legendary Boris Karloff is completely wasted in this mind-numbingly boring piece of trash.At the end of his life,seriously ill he plays the blind and crippled Charles Badulescu,a famous sculptor.He works on his final magnum opus completely unaware that the bones he has been using are the remains of the victims of his murderous wife."Cauldron of Blood" is a chore to sit through.The acting is painfully bad,the suspense is non-existent and the editing is awful.The film is terribly boring and filled with tons of uninteresting talking.The only reason to watch this utterly worthless bore is Karloff,but even his classy performance can't save it.Avoid this one like the plague-you'll thank me later.1 out of 10.