These meteors have the unique ability to capture images of nearby dinosaurs' dreams and create them as crystal projections in the real world. These dream-things, both creatures and objects, are able to touch and be touched by living things, but have no heartbeat. They start out weak, but reach full strength in eight hours after their initial creation. Pterosaurs like Sprite cannot dream and are immune to a meteor's effects, and presumably raptors are resistant to them as well.