Primordial Hydra [Foil] is a card from the Magic: The Gathering Core Set 2013, categorized as Unknown rarity. With its ability to grow exponentially each turn, it serves as a potent threat in various green-centric decks. Currently valued at $20.00, this foil version appeals to both competitive players and collectors alike, reflecting its significance in the game's ecosystem and its desirability for deck-building and collection purposes.