Dance Of Death (1968)

Starring Boris Karloff, Julissa, Andres Garcia, Angel Espinoza, Beatriz Baz
Directed by Juan Ibanez
(actor & director credits courtesy IMDB.com)

A wealthy recluse invites his heirs to visit him at his estate, where they learn of the evils perpetrated by his maddened brother, and of the murderous mechanical dolls on the grounds.

Another of the Mexican horror movies Boris Karloff filmed scenes for before his death, this one suffers from a vaguely defined plot and Karloff's absence for much of the picture.  Although there are some effective sequences and a fiery climax comes off well, there are numerous head-scratching moments where motivations or events are never explained, and the film's too darkly lit during some important nighttime scenes.  Karloff still turns in a game effort, but it's not enough to save the film.