Vampire Circus (1972) [Blu-ray + DVD]

A little girl is slain by a vampire in a 19th century Austrian village. Seeking revenge, the townspeople invade the castle of Count Materhaus and kill him for the crime. As the Count dies, he curses the villagers and vows their children will all die. Fifteen years later, as the village is ravaged by the plague, a circus comes to town. The circus is actually a troupe of shape-shifting vampires...