The Great Henge [Throne of Eldraine] DP34 Nightmare's power and toughness are

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

−X: Search your library for an artifact card with mana value X or less

Each creature you control with a +1/+1 counter on it has trample

/ Then pass me those souls

The Great Henge [Throne of Eldraine] DP34 Nightmare's power and toughness areSet: Throne of Eldraine Type: Legendary Artifact Rarity: Mythic Cost: {7}{G}{G} This spell costs {X} less to cast, where X is the greatest power among creatures you control. {T}: Add {G}{G}. You gain 2 life. Whenever a nontoken creature enters the battlefield under your control, put a +1 +1 counter on it and draw a card.