Card advantage

   Card Advantage is a general condition when one player has more playable cards than his opponent.  Placing the right cards for future use can become a major threat to an opponent, but this is only one way to achieve card advantage.  Card advantage can be gained when one player must discard more cards than the other.  The third major way to achieve card advantage is to use cards that add cards to the player's hand or take cards away from the opponent's hand.  The loss of card advantage is the main reason why some cards are rarely used in competitive play, like Doubleshots, Basic Universe and Training cards. 

See Also

Placing