Giant Koi is a common Creature — Fish card from Avatar: The Last Airbender (TLA), collector number 53. Current market price: $0.14 (foil $0.25), TCGplayer market prices via Scryfall.
Waterbend {3}: This creature can't be blocked this turn. (While paying a waterbend cost, you can tap your artifacts and creatures to help. Each one pays for {1}.) Islandcycling {2} ({2}, Discard this card: Search your library for an Island card, reveal it, put it into your hand, then shuffle.)