The set will focus on the aftermath of the siege of Gear Palace by Shiny Mega Gardevoir-EX, with Mythical Steam Pokemon Volcanion trying to stop them. In addition, Xerneas and Yveltai are just a few of many Pokemon getting a BREAK Evolution.
The set includes 110 cards, 8 new dual-type Pokemon, 6 new Pokemon-EX (including two Mega Evolution Pokemon), and 7 new Pokemon BREAK.
8 Pokmon TCG: XY-Steam Siege booster packs
65 card sleeves featuring Volcanion
45 Pokmon TCG Energy cards
A player's guide to the XY-Steam Siege expansion
6 damage-counter dice
1 competition-legal coin-flip die
2 acrylic condition markers
A collector's box to hold everything,with 4 dividers to keep it organized
A code card for the PokmonTrading Card Game Online