Stealth Dragon, Shiranui

: 1 When your G unit during your turn, you may pay the cost. If you do, choose up to one of your opponent's rear-guards, bind it face up, your opponent chooses a card from his or her hand, and discards it. At the end of that turn, your opponent puts the card that was bound with this effect into his or her hand. :When this unit attacks, if the number of cards in your hand is less than your opponent's, this unit gets +5000/ +1 until end of that battle.