Unown T Mysterious Treasures / dp2-67

Once during your turn (before your attack), if Unown T is your Active Pokémon, you may discard a card from your hand. Then, flip a coin. If heads, put 2 damage counters on 1 of your opponent's Benched Pokémon. This power can't be used if Unown T is affected by a Special Condition.

Look at your opponent's hand and choose 1 card, then have your opponent shuffle that card into his or her deck. Then, show your opponent your hand and he or she chooses 1 card. Shuffle that card into your deck.