Simic Signet is an artifact card from the Magic: The Gathering Commander 2016 set, categorized as an Unknown rarity. Priced at approximately $0.25, it serves as a staple mana acceleration tool in Simic (blue and green) decks, allowing players to tap for both colors of mana. Its affordability and utility contribute to its steady presence in the secondary market, appealing to both casual and competitive players alike.