Power-up Cards are used along with regular trading cards to give a player special powers in battle. Each Power-up card contains a description that tells you how to play that card. Most Power-ups can be played at any time during a game, even after attack and defense rolls have taken place, but some can only be used under certain conditions. Power-up cards are used in Battle of the Monsters Game 3 and up. There are 65 cards in this catagory. Look up Battle of the Monsters - Power-Up Cards on how to use these cards in play.