Katara: Protecting Aang [Avatar: The Last Airbender]

[CONT] If you have 2 or more other "World of Avatar" characters, this card gets +500 power and the following ability. "[AUTO] [(1)] At the beginning of your opponent's attack phase, you may pay the cost. If you do, choose this card and 1 of your "World of Avatar" characters, and exchange them as [STAND]." [AUTO] When this card is placed on the stage from your hand, you may put the top card of your clock into your waiting room.