dc deck building game arkham asylum shadows expansionDC Deck Building Game: Arkham Asylum Shadows Expansion BATS AND ASSASSINS INVADE ARKHAM ASYLUM! This expansion for DC Deck Building Game: Arkham Asylum enhances the game by introducing dozens of new cards and letting you play as the Bat Family or League of Assassins! This is not a standalone product. Requires any DC Deck Building Game base game to play, but optimized for DC Deck Building Game: Arkham Asylum. Key Features: JOIN THE BAT FAMILY OR LEAGUE