Nykthos, Shrine to Nyx [Theros] Phyrexian Wurm Nightmare's power and toughness are

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

Set: Lorwyn Type: Sorcery Rarity: Rare Cost: {B} Target player reveals their hand

Set: Antiquities Type: Artifact Creature — Thopter Rarity: Common Cost: {0} Flying

Eat some food: Regenerate Yule Ooze

Each opponent loses 1 life and you gain 1 life

Nykthos, Shrine to Nyx [Theros] Phyrexian Wurm Nightmare's power and toughness areSet: Theros Type: Legendary Land Rarity: Rare {T}: Add {C}. {2}, {T}: Choose a color. Add an amount of mana of that color equal to your devotion to that color. (Your devotion to a color is the number of mana symbols of that color in the mana costs of permanents you control.)