Pokémon TCG: XY: Steam Siege - Prerelease KitSet: XY: Steam Siege Sealed Release Date: 2016 06 17 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: XYSteam Siege expansion! This XY: Steam Siege Prerelease Kit includes 4