Prometheus, King of the Shadows [FOTB-EN063] Secret Rare Secret Utility Box if you did not Normal

if you did not Normal Summon or Set a monster this turn

This card cannot be Special Summoned except by sending 3 face-up Trap Cards you control to the Graveyard

except "Vaalmonica Scelta"

Set: Duelist League Promo Card type: Effect Monster Rarity: Rare Attack: 1200 Defense: 1400 When this card is destroyed by battle and sent to the Graveyard: You can Special Summon 1 Zombie-Type monster with 2000 or less DEF from your Deck

Set: Rarity Collection (25th Anniversary Edition) Card type: Tuner/Effect Monster Rarity: Quarter Century Secret Rare Attack: 0 Defense: 1800 During either player's turn

Prometheus, King of the Shadows [FOTB-EN063] Secret Rare Secret Utility Box if you did not NormalSet: Force of the Breaker Card type: Effect Monster Rarity: Secret Rare Attack: 1200 Defense: 800 When you Normal Summon this card, remove from play any number of DARK monsters in your Graveyard. This card gains 400 ATK for each removed card, until the End Phase of this turn.