Digimon Dim Card Set: Mad Black Roar & True Shadow HowlThese cards are exclusively made for the Digimon Vital Bracelet! By inserting it into the bracelet, you can add areas, missions, and Digimons. The Mad Black Roar & the True Shadow Howl Dim Card are the latest addition to the Dim Card familly collection. Get them and increase your Digimon portfolio. Note: Once you use a Dim Card on a Vital Bracelet, that particular Dim card is locked to that device, so you cannot use it on another device.