Cryptozoic Entertainment - Challenge of the SuperfriendsThe Superfriends have gathered at the Hall of Justice to take on the challenge of thirteen of the most sinister villains of all time. Play your cards right and you'll defeat the Legion of Doom! Based on the classic animated TV show,Challenge of the Superfriends Card Gameuses Cryptozoic's "Gryphon" card game engine to deliver a simultaneous, easy to learn tabletop experience. Each player has a ten card deck that allows them to call forth allies or use