Union Arena's Attack on Titan set represents a significant moment in anime trading card games, bringing Hajime Isayama's acclaimed series to the TCG market during a period of renewed collector interest in anime properties. Released in 2025, the set captures the franchise at a pivotal moment in its narrative, offering both longtime fans and newer collectors an opportunity to engage with the series through the trading card medium. Historia Reiss stands as a pivotal character throughout the series, and this Super Rare iteration reflects her significance within the story. Collectors are drawn to Historia cards for her complex role in the plot's major revelations, making her among the most sought-after character pulls from this set.