Book of Power 1 – Play before you roll a Haos or Darkus. If your roll results in a battle, raise your Bakugan's G-Power to the highest printed G-Power in any opponent's used pile.Book of Power 2 - Play before you roll a Ventus or Sub Terra. If your roll results in a battle, all players in the battle must swap their Bakugan with one from their used pile, if possible.Book of Power 3 - Play before you roll a Pyrus or Aquos Bakugan. If your roll results in a battle, lower an opponent's Bakugan's G-Power to the lowest printed G-Power in any opponent's used pile.