Tale of Katara and Toph is a rare Enchantment card from Avatar: The Last Airbender Eternal (TLE), collector number 143. Current market price: $2.03 (foil $4.86), TCGplayer market prices via Scryfall.
Creatures you control have "Whenever this creature becomes tapped for the first time during each of your turns, put a +1/+1 counter on it."