Flexible Waterbender is a common Creature — Human Warrior Ally card from Avatar: The Last Airbender (TLA), collector number 50. Current market price: $0.10 (foil $0.19), TCGplayer market prices via Scryfall.
Vigilance Waterbend {3}: This creature has base power and toughness 5/2 until end of turn. (While paying a waterbend cost, you can tap your artifacts and creatures to help. Each one pays for {1}.)