Patron of the Orochi is a rare Legendary Creature — Spirit card from Betrayers of Kamigawa (BOK), collector number 138. Current market price: $11.57 (foil $42.63), TCGplayer market prices via Scryfall.
Snake offering (You may cast this spell any time you could cast an instant by sacrificing a Snake and paying the difference in mana costs between this and the sacrificed Snake. Mana cost includes color.) {T}: Untap all Forests and all green creatures. Activate only once each turn.