Nightmare [Unlimited Edition] Elf Archer Set: Mercadian Masques Type: Instant

Set: Mercadian Masques Type: Instant Rarity: Rare Cost: {3}{U}{U} You may exile a blue card from your hand rather than pay this spell's mana cost

Set: Arabian Nights Type: Artifact Rarity: Uncommon Cost: {4} {2}

the sun pauses at the horizon long enough for a certain species of violet to bloom with the fragrance of mischief

Set: Eventide Type: Enchantment Rarity: Rare Cost: {2}{W}{W} Chroma — Each creature you control gets +1/+1 for each white mana symbol in its mana cost

If the player does

Nightmare [Unlimited Edition] Elf Archer Set: Mercadian Masques Type: InstantSet: Unlimited 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 Nightmare arises from its lair in the swamps. As the poisoned land spreads, so does the Nightmare's rage and terrifying strength.