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 Pokémon 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 Pokémon TCG: XY—Steam Siege expansion!
The Pokémon TCG: XY—Steam Siege expansion contains over 110 cards. Each player must have a 60-card deck of Pokémon cards to play.