Il plenilunio delle vergini (1973)

Synopsis

The 1800s: scholarly Karl Schiller believes he's found the ring of the Nibelungen, which holds great power. It's at Castle Dracula. His twin, Franz, a gambler, asks if vampires frighten Karl; Karl shows him an Egyptian amulet, which may protect him. Franz takes the amulet and sets out ahead of his brother, arriving at the castle first. There he finds a countess who invites him to dine. Later that night, Karl arrives. Coincidently, it's the Night of the Virgin Moon, a night that falls every fifty