A darkness has fallen over the Yu-GI-Oh! Trading Card Game. Can you master it to dominate your opponents? The Lair of Darkness structure deck comes with 41 cards, including two ultra rares, three super rares, and 36 common cards. Decks also come with one common token, a double-sided playmat/dueling guide, and a beginner's guide for newcomers to the series. Lark of Darkness is the 41st deck in the Trading Card Game's Structure Deck series.