Millennium Blades: Set Rotation Set Rotation includes 12 new card sets, 9 promo sets, 4 new characters, and a cooperative "boss mode", giving you half again as much content as the base game and opening up even more variety and options for play. Set Rotation is designed with advanced gamers in mind, and gives you additional depth and strategy for experiencing Millennium Blades. Set Rotation is the first large expansion for Millennium Blades. Millennium Blades is required to play. Ages 12+ Number of Players: 2-5