Pokemon TCG: Terastal Festival Ex is High Class Japenese Booster Pack.
 
The Terastal Festival Ex subset features an exciting lineup of Pokémon ex and ACE SPEC cards, marking the debut of Eevee and its Eeveelutions as Tera Pokémon ex. To enhance its appeal, some cards include a unique Mirror Holofoil design with a Poké Ball pattern. Additionally, select cards from this set will be included in the English Prismatic Evolutions expansion.
Contents:
Each booster pack contains 10 cards.