Mountain [Foil] is a land card from the Magic: The Gathering Onslaught set, designated as card #345 with an Unknown rarity. As a basic land, it provides red mana, essential for casting spells in red decks. Currently valued at $2.68, its foil version offers a unique aesthetic appeal for collectors and players alike, contributing to its demand in the market. The card's value reflects the interest in both competitive play and collecting within the game.