The Pokemon Mystery Pack includes 10 cards featuring characters from various sets like Surging Sparks and Twilight Masquerade. Each pack is guaranteed to contain at least one rare card, with the possibility of additional promotional, full art, or extended art cards. The cards are in English, manufactured by Nintendo in the United States, and suitable for ages 4 and up. Perfect for collectors or players looking to add unique and valuable cards to their Pokemon TCG collection.