Nightmare [Ninth Edition] Mirrodin Besieged a dwarf can build it

a dwarf can build it

Set: Mirrodin Type: Artifact Creature — Bird Rarity: Common Cost: {4} Flying

Set: Mercadian Masques Type: Instant Rarity: Common Cost: {B} Add {B}{B}{B}

Set: Commander 2015 Type: Creature — Demon Rarity: Rare Cost: {4}{B}{B} Flying

Set: Beta Edition Type: Instant Rarity: Uncommon Cost: {U} Cast this spell only during an opponent's turn

Nightmare [Ninth Edition] Mirrodin Besieged a dwarf can build itSet: Ninth Edition 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 thunder of its hooves beats dreams into despair.