Prometheus, King of the Shadows [SR06-EN006] Common Null Set: Hidden Summoners Card type:

Set: Hidden Summoners Card type: Tuner/Effect Monster Rarity: Super Rare Attack: 1300 Defense: 400 When this card is Special Summoned: You can target up to 2 cards in your opponent's GY

then Special Summon from your Extra Deck

If this card is Special Summoned from the GY

and either add it to your hand or send it to the GY

Prometheus, King of the Shadows [SR06-EN006] Common Null Set: Hidden Summoners Card type:Set: Structure Deck: Lair of Darkness Card type: Effect Monster Rarity: Common Attack: 1200 Defense: 800 If this card is Normal Summoned: Banish 1 or more DARK monsters from your GY, and if you do, this card gains 400 ATK for each, until the end of this turn.