The Pokémon TCG: Mega Evolution—Phantasmal Flames booster box contains 36 booster packs, with each pack having 10 cards and a basic energy. This specific expansion features new Mega Evolution Pokémon ex, such as Mega Charizard X ex and Mega Gengar ex, and includes over 120 cards to collect.
 
Booster boxes are a popular way for serious collectors and competitive players to acquire a large number of cards for their collection or deck-building needs.