Kaiser Nail - ST2-15 - C Tweet Details Card Name: Kaiser Nail Card Number: ST2-15 Card Type: Option Color: Blue Effect: [Main] Choose a Digimon digivolution card placed under 1 of your Digimon and play it as another Digimon without paying its memory cost. Finish: Regular Play Cost: 4 Rarity: C Security Effect: [Security] Activate this card's [Main] effect. Art Style: Normal