Emeria, the Sky Ruin [Commander 2014] Nightmare Horse Echo {2}{R}{R} (At the beginning

Echo {2}{R}{R} (At the beginning of your upkeep

add this card's effects to that spell

Set: Alpha Edition Type: Artifact Rarity: Uncommon Cost: {1} Whenever a player casts a green spell

Set: Saviors of Kamigawa Type: Legendary Creature — Moonfolk Monk Rarity: Rare Cost: {1}{U} Flying

Mishra also mastered the intricacies of artifice

Emeria, the Sky Ruin [Commander 2014] Nightmare Horse Echo {2}{R}{R} (At the beginningSet: Commander 2014 Type: Land Rarity: Rare Emeria, the Sky Ruin enters the battlefield tapped. At the beginning of your upkeep, if you control seven or more Plains, you may return target creature card from your graveyard to the battlefield. {T}: Add {W}.