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 pokeacutemon 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 pokeacutemon tcg xymdashsteam siege expansion r r r over 110 cardsr r 8 new dual type pokeacutemon many of them shinyr r 6 new pokeacutemon e