Shield and Buckler, Maple & Sally

【AUTO】 [Put 1 card from your hand into your waiting room] When this card is placed on the stage from your hand, you may pay the cost. If you do, choose 1 of your opponent's level 1 or higher characters, your opponent chooses 1 level X or lower character in their waiting room, and exchanges them. X is equal to the level of the character you chose -1.