[[Spanish release date::| ]][[Spanish Sneak Peek date::| ]] The The Valuable Book 12 promotional cards are two promotional cards, included with copies of The Valuable Book 12. The cards include 2 Ultra Rare Synchro Monsters, "Underground Arachnid" and "Zeman the Ape King", both of which were Dark Synchro Monsters in the Yu-Gi-Oh! 5D's anime.