Katara, Bending Prodigy is a uncommon Legendary Creature — Human Warrior Ally card from Avatar: The Last Airbender (TLA), collector number 59. Current market price: $0.22 (foil $0.30), TCGplayer market prices via Scryfall.
At the beginning of your end step, if Katara is tapped, put a +1/+1 counter on her. Waterbend {6}: Draw a card. (While paying a waterbend cost, you can tap your artifacts and creatures to help. Each one pays for {1}.)