The Unagi of Kyoshi Island is a rare Legendary Creature — Serpent card from Avatar: The Last Airbender (TLA), collector number 319. Current market price: $3.24 (foil $4.31), TCGplayer market prices via Scryfall.
Flash Ward—Waterbend {4}. (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {4}. They can tap their artifacts and creatures to help. Each one pays for {1}.) Whenever an opponent draws their second card each turn, you draw two cards.