Master Set refers to the number of unique cards in a set, including different rarities, or in the case of Structure Decks, the amount of cards in the set including repeated cards. Example Set: 60 cards * 10 Ultra Rares * 10 Super Rares * 20 Rares * 20 Commons Additional Rarities of Cards above (assume all to be unique) * 5 Secret Rares * 1 Holographic Rare * 40 Ultimate Rares The Official Set Designation is 60 Cards. However, if the Additional rarities were to be included in the count, the Master Set count would be 106.