Swamp is a basic land card from the Magic: The Gathering Theros set, designated as card #238 with an Unknown rarity. As a staple in many decks, it provides black mana essential for casting spells. Currently valued at $1.15, its market price reflects its utility rather than rarity, making it an accessible option for players and collectors alike. Basic lands like Swamp are often sought after for their iconic artwork and gameplay function.