Nightmare (Retro) [30th Anniversary Edition] Modern Horizons 2 Prerelease Promos do 10 damage to each

do 10 damage to each of your opponent's Benched Pokemon

Urza decided to create one versatile being

Set: 30th Anniversary Edition Type: Creature — Serpent Rarity: Common Cost: {5}{U} Sea Serpent can't attack unless defending player controls an Island

I'd have told you what it was

Nightmare (Retro) [30th Anniversary Edition] Modern Horizons 2 Prerelease Promos do 10 damage to eachSet: 30th Anniversary 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.