Greater Good [Judge Gift Cards 2014] Kaladesh Inventions Nightmare's power and toughness are

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

Sacrifice Lotus Petal: Add one mana of any color

Set: Portal Three Kingdoms Type: Creature — Ox Rarity: Uncommon Cost: {3}{G} Swampwalk (This creature can't be blocked as long as defending player controls a Swamp

Set: Aether Revolt Prerelease Promos Type: Legendary Artifact Rarity: Mythic Cost: {5} Whenever you cast a spell

Greater Good [Judge Gift Cards 2014] Kaladesh Inventions Nightmare's power and toughness areSet: Judge Gift Cards 2014 Type: Enchantment Rarity: Rare Cost: {2}{G}{G} Sacrifice a creature: Draw cards equal to the sacrificed creature's power, then discard three cards. "To examine the causes of life, we must first have recourse to death." Mary Shelley, *Frankenstein*