Card advantage

Card Advantage is a general condition when you have more playable cards than your opponent. Placing the right cards for future use can become a major threat to your opponent, especially if you never have to use them. You can also gain card advantage when your opponent must discard more cards than you, but do not count on this too often. The third major way to achieve card advantage is to use cards that add cards to your hand or take cards away from your opponent's hand. The loss of card advantage is the main reason why some cards are rarely used in competitive decks, like Doubleshots, Basic Universe and Training cards.