# Red Herring Red Herring is a playtest card from Mystery Booster's 2019 experimental set, making it inherently unusual in collector circles. These cards were never meant for official play, which gives them a distinct appeal to players interested in design history and the creative process behind Magic. Collectors value playtest cards for their transparency into how designers iterate on mechanics and balance. Red Herring's rarity designation reflects its experimental nature rather than constructed playability. The nonfoil-only status is standard for this entire subset. Collectors typically seek these cards as curiosities that reveal Magic's behind-the-scenes development, rather than as competitive staples.