Sirenmon - BT1-057 - U Tweet Details Attribute: Vaccine Card Name: Sirenmon Card Number: BT1-057 Card Type: Digimon Color: Yellow Digimon Type: Holy Beast Digivolve 1 Cost: 3 from LV4 DP: 7000 Effect: [When Attacking] Gain 3 memory. At end of turn? lose 3 memory. Finish: Regular Form: Ultimate Level: 5 Play Cost: 6 Rarity: U Art Style: Normal