Nightmare [Collectors' Edition] Core Set 2019 you may search your library

you may search your library for a creature card with mana value 1 or less

Set: Ultimate Masters Box Topper Type: Legendary Creature — Kithkin Advisor Rarity: Mythic Cost: {G}{W} Noncreature spells with mana value 4 or greater can't be cast

“I'm too modest a wizard to reveal the full extent of my abilities

you may return that card to the battlefield under your control

Set: Urza's Saga Type: Sorcery Rarity: Rare Cost: {2}{B} Until end of turn

Nightmare [Collectors' Edition] Core Set 2019 you may search your librarySet: Collectors' 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.