Appa: Ready to Fight [Avatar: The Last Airbender]

[AUTO] At the beginning of your attack phase, choose 1 of your "World of Avatar" characters, and that character gets +1000 power until end of turn. [AUTO] [Put 1 card from your hand into your waiting room] At the beginning of your opponent's attack phase, you may pay the cost. If you do, choose 1 of your other characters, put it face up underneath this card as a marker, at the beginning of your next draw phase, choose 1 character from the markers underneath this card, and put it in any position of your stage.