The 10 most expensive pokemon cards of Steam Siege (Chase cards)

Released on August 3, 2016, Steam Siege is the eleventh main expansion of the XY series, centered on the clash between Volcanion and the Mythical Pokémon Magearna alongside continued support for the BREAK Evolution mechanic. The set features Pokémon-EX like Volcanion-EX, Steelix-EX, and Gardevoir-EX, with dual-type Pokémon adding strategic depth to deckbuilding. Though sometimes overshadowed by flashier XY-era sets, Steam Siege delivered key competitive staples and introduced the Steam-themed aesthetic to the TCG. Here are the 10 most expensive cards from this expansion.