Index Card [Yellow] is a utility card from the Digimon Double Diamond set for the Digimon card game, listed with Unknown rarity. Collectors will find it useful for completing set runs or thematic Yellow decks, though its market impact is minimal given the current value of $0.00. Grading or sales history is limited, so demand and future pricing remain uncertain. Its presence is primarily of interest to completionists and color-focused collectors.