Crux of Fate (Japanese) [Strixhaven: Mystical Archive] Vintage Nightmare's power and toughness are

Nightmare's power and toughness are each equal to the number of Swamps you control

But if you choose death instead

Set: Abyss Rising Card type: Xyz/Effect Monster Rarity: Ghost Rare Attack: 2800 Defense: 2100 4 Level 4 WATER monsters // You can also Xyz Summon this card by using a "Number 32: Shark Drake" you control as the Xyz Material

Set: Duel Terminal 4 Card type: Fusion/Effect Monster Rarity: Ultra Rare Attack: 2800 Defense: 2400 "Naturia Beast" + "Naturia Barkion" A Fusion Summon of this card can only be conducted with the above Fusion Material Monsters

during that damage calculation only

Crux of Fate (Japanese) [Strixhaven: Mystical Archive] Vintage Nightmare's power and toughness areSet: Strixhaven: Mystical Archive Type: Sorcery Rarity: Mythic Cost: {3}{B}{B} Choose one Destroy all Dragon creatures. Destroy all non Dragon creatures. **