Steam Siege arrived in 2016 as the fourth set of the XY era, introducing the Mythical Pokémon Volcanion to the TCG for the first time. The set marked a transitional moment in the modern game, balancing established mechanics with new strategic possibilities. Steam Siege remains notable among collectors for its memorable artwork and its role in capturing a specific moment of Pokémon TCG history during the franchise's cultural resurgence. Volcanion ex represents one of the set's marquee pulls, featuring the powerful Fire-type Mythical in striking illustration. Collectors seek this card both for its legendary subject matter and as a centerpiece from an era when ex Pokémon held significant appeal in constructed play. Its place in Steam Siege makes it a natural target for set builders and enthusiasts of this particular format.