Prometheus, King of the Shadows [DESO-EN047] Super Rare BT4-046 If this face-up card leaves

If this face-up card leaves the field: You can target 1 card on the field

when this card is targeted for an attack: You can make this card's ATK become double its current ATK until the end of the Damage Step

or Graveyard

Set: Release Special Booster Promos Card type: Digimon Rarity: Promo Digi type: Cyborg Play Cost: 13 Form: Mega Attribute: Virus Digivolve Cost: 4 Digivolve Cost Level: 5 Your Turn] When you have a green Tamer in play

Prometheus, King of the Shadows [DESO-EN047] Super Rare BT4-046 If this face-up card leavesSet: Destiny Soldiers Card type: Effect Monster Rarity: Super Rare Attack: 1200 Defense: 800 If this card is Normal Summoned: Banish any number of DARK monsters from your Graveyard, and if you do, this card gains 400 ATK for each, until the end of this turn.