Registeel (SM75) (Staff Prerelease Promo) [Sun & Moon: Black Star Promos] 74 destroy all Fiend-Type monsters Special

destroy all Fiend-Type monsters Special Summoned by this effect

you can look at 1 face-down card that's been Set by your opponent as long as this card remains face-up on the field

including this card

Set: Dark Crisis Card type: Fusion/Effect Monster Rarity: Super Rare Attack: 2200 Defense: 800 "Dark Magician" + "Flame Swordsman" Any damage to the controller of this card from battle involving this monster becomes 0

Set: Dark Revelation Volume 4 Card type: Effect Monster Rarity: Ultra Rare Attack: 2300 Defense: 1400 If this card is discarded from the hand to the Graveyard by a card effect: Special Summon it

Registeel (SM75) (Staff Prerelease Promo) [Sun & Moon: Black Star Promos] 74 destroy all Fiend-Type monsters SpecialSet: Sun & Moon: Black Star Promos Type: Metal Rarity: Promo Retreat cost: Colorless,Colorless. Colorless