Finally, fans can build the mythical fortress of Eternia and uncover the secrets within Castle Grayskull to become Masters of the Universe. When fans construct their own Castle Grayskull, only they hold the power. Inspired by the original version of Masters of the Universe, the castle has been meticulously recreated - complete with a functioning elevator, towers, and a throne room with a trapdoor. As in the series, He-Man's Sword of Power serves as the key to the castle gate. Once the massive castle, made up of over 3,500 pieces, is assembled, the battle for Eternia can begin with the six included micro-action figures: He-Man, Skeletor, Man-At-Arms, Beast Man, The Goddess, and The Sorceress. Originally built to protect an unknown source of power, Castle Grayskull can now be recreated at home. Perfect for fans aged 14 and up.