Fan Casting House of the Monsters (1982)

A dozen people, all very different, have been invited to spend a weekend in a mansion at the other end of the woods of Wyoming, far from any civilization, in order to all obtain something that they are looking for. But their host, the mysterious Ardath Bay, is actually the Mummy Imhotep, who broke free from Hamunaptra years ago and formed an alliance with several other cruel monsters like himself. Their goal, sacrifice several people, in order to release from a prison of another dimension, the powerful demon Déak, who reigned terror in the Middle East millennia ago. They then intend to dominate the world, unless the last born of the Van Helsing family heard of what is going in this House of Monsters...