This detailed set from Mattel Brick Shop creates the hideout of our heroes, Castle Grayskull. With 16 NanoWorld figures, special effects, and authentic details, the battle between the heroes of Eternia and Skeletor can be accurately reenacted. The conflict between good and evil can be built and displayed as desired. Collectors can collect all Masters of the Universe building sets from Mattel Brick Shop (all items sold separately) and recreate the movie.