These sleds came in very rare boxed sets called Fantasy Assortment. They are one of the very last Multi-Toys additions to the Dragonriders of the Styx line. Some people claim the Cyclops is more rare than the Dragon, but I don't really know. These sleds are among the very rarest DFC/Multi-Toy items.
Several of the pictures of packaged sets below were provided by friend of the blog Chris K.