The Pokémon TCG: Mega Dream ex Korean booster pack is part of a “High-Class” expansion set (set number M2a) and contains 10 cards per pack. The set introduces new rarities such as “MA (Mega Attack Rare)” and “Mega Stone Mirror”. It features powerful Mega Pokémon ex cards, including Mega Dragonite ex, Mega Gengar ex, Mega Froslass ex, and Mega Charizard X ex.