If you're building fantasy worlds, there are few better inspirations than the budget science fiction and horror drive-in movies hammered out during the 1950s and 1960s. My favorite is 1964's The Creeping Terror. It rivals Plan 9 From Outer Space and Troll 2 for inspired lunacy. The monster resembles a Chinese dragon puppet made of shag carpet. The Creeping Terror and hundreds of other movies are available at the Archive. Be sure to watch to at least the four minute mark, when the monster exits the flying saucer. Your life will be richer for it.