Demise, King of Armageddon (UTR) [SOI-EN035] Ultimate Rare WTR215-C that monster you control gains

that monster you control gains 2000 ATK and DEF during that damage calculation only

Set: Sneak Preview Series 1 Card type: Effect Monster Rarity: Ultra Rare Attack: 1800 Defense: 1300 This card's name is treated as "Harpie Lady"

If Tome of Fyendal is played from arsenal

Set: Duel Terminal 4 Card type: Synchro/Effect Monster Rarity: Ultra Rare Attack: 2400 Defense: 1700 1 Dragon-Type Tuner + 1 or more non-Tuner Winged Beast-Type monsters Once per turn

Demise, King of Armageddon (UTR) [SOI-EN035] Ultimate Rare WTR215-C that monster you control gainsSet: Shadow of Infinity Card type: Effect Monster Rarity: Ultimate Rare Attack: 2400 Defense: 2000 This card can only be Ritual Summoned with the Ritual Spell Card," End of the World". By paying 2000 Life Points, destroy all cards on the field except this card.