Details : This 40-card deck is built around 'Caius the Shadow Monarch', a dark monster that may be one of the most powerful monsters found on a structure deck yet! Combine The Dark Emperor with your Dark army from the Phantom Darkness booster set and you're on your way to victory! Enjoyable for the intermediate player and containing strong cards for the tournament-level player, The Dark Emperor also comes with a rulebook, an exclusive playmat and a deckbuilding strategy guide that explains some of the explosive combos and some relevant cards from recently-released product to help build an even stronger deck.