Logic Knot [Foil] is a card from the Magic: The Gathering Modern Masters set, categorized as an Unknown rarity. With its ability to counter spells while allowing players to delve into their graveyards, it serves a strategic role in various blue-based control decks. Currently valued at $0.63, its foil version appeals to collectors and players alike, contributing to its presence in the market as a budget-friendly option for enhancing decks.