Boss Monster: 10th Anniversary EditionBoss Monster is the best selling card game that challenges players to become the ultimate villain by creating the deadliest dungeon! With over a million copies sold, this game's nostalgic appeal and fast paced gameplay have made it an evergreen hit. Celebrate a decade of Boss Monster with this revised 10th Anniversary Edition! Modernized rules help new and seasoned players and cards have been updated for more balanced play. 8 new room cards, 4 new