Master Piandao is a uncommon Legendary Creature — Human Warrior Ally card from Avatar: The Last Airbender (TLA), collector number 28. Current market price: $0.19 (foil $0.25), TCGplayer market prices via Scryfall.
First strike Whenever Master Piandao attacks, look at the top four cards of your library. You may reveal an Ally, Equipment, or Lesson card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.