Obsidian Flames arrived in 2023 as a mainline set that continued Pokémon's strong post-pandemic trading card momentum. This era saw refined design philosophies and competitive tournament presence, with sets like this one maintaining collector interest across both vintage enthusiasts and newer players drawn to contemporary releases. Houndour's secret rare treatment elevates this Pokémon beyond its standard versions, featuring alternate art that appeals to collectors pursuing complete rainbow sets and specialty variants. The dark-type hound holds appeal for both Pokémon fans and those building thematic collections around fire and darkness aesthetics.