Pay one gauge, and discard one card from your hand. (This card can be activated at any point during the game after it's been Set) When this card activates, shuffle all monsters on the entire field into their owner's deck. Then, flip a coin. If it is heads, all players take 1 damage for every card sent back to their deck through this effect. If it is tails, all players gain 1 life for every card sent back to their deck.