Adolfo López Portillo

In 1661 Mexico, Baron Vitelius is executed for witchcraft. 300 years later, during a comet's return, he resurfaces as a brain-eating monster seeking revenge on the Inquisitors' descendants.

Ugly-duckling older guy falls in love with a beautiful young woman. Offering her a marriage of convenience, to give her baby a father, might be a way to win her affection... Ya think?

A group of archaeologists break into the tomb of an ancient Aztec general, arousing the warrior's head and sending his undead servant out to take revenge on the careless scientists.