Sea Serpent is a Common rarity creature card from the Revised Edition set of Magic: The Gathering. Valued at approximately $0.13, it represents an early example of the game's design, showcasing the aquatic theme prevalent in many blue cards. Collectors may find it appealing for its nostalgic value and its role in the historical context of Magic's development. Its low market price makes it accessible for both new players and seasoned collectors seeking to complete their sets.