This is a Pokemon booster box which contains 36 packs with 10 random cards inside each one. Description of the XY-Primal Clash line of cards is below:
An amazing discovery has been made in the Pokemon TCG! Pokemon BREAK Evolution opens a new path to power that builds on a Pokemon’s existing strengths and creates all-new battling options! These new Pokemon BREAK come from twin worlds, home to Zoroark BREAK, Mega Mewtwo X, and Mega Mewtwo Y. One world of technology, one world of nature, and all the wonders of BREAK Evolution are yours to explore in the Pokemon TCG: XY—BREAKthrough expansion!
The Pokemon TCG: XY—BREAKthrough expansion includes:
Over 160 cards
6 new Pokemon BREAK featuring a brand-new game mechanic
8 new Pokemon-EX, including 4 Mega Evolution Pokemon