Pokemon TCG Steam Siege Booster BoxEach booster box contains 36 booster packs. Dual Powers Clash! Long years of stability come to an end when Shiny Mega Gardevoir EX lays siege to the mighty Gear Palace with a host of greedy forces. The Mythical Steam Pokmon Volcanion must wield the dual powers of fire and water to stop them! As the battle rages, Xerneas BREAK and Yveltal BREAK face off in the Pokmon TCG: XY Steam Siege expansion! The Pokmon TCG: XY Steam Siege expansion contains over