Nightmare [Foreign Black Border] Comet Set: XY: BREAKthrough Type: Stadium

Set: XY: BREAKthrough Type: Stadium Rarity: Promo

Set: EX: Crystal Guardians Type: Water Rarity: Uncommon Retreat cost: Colorless

All Phyrexians who met them were transformed into pieces

Set: Sword & Shield: Evolving Skies Type: Fighting Rarity: Ultra Rare Retreat cost: Colorless

Nightmare [Foreign Black Border] Comet Set: XY: BREAKthrough Type: StadiumSet: Foreign Black Border Type: Creature Nightmare Horse Rarity: Rare Cost: {5}{B} Flying (This creature can't be blocked except by creatures with flying or reach.) Nightmare's power and toughness are each equal to the number of Swamps you control. The nightmare arises from its lair in the swamps. As the poisoned land spreads, so does the Nightmare's rage and terrifying strength.