Nightmare (119) [Unlimited Edition] XY BREAKthrough Set: Dominaria United Commander Type:

Set: Dominaria United Commander Type: Legendary Planeswalker — Dihada Rarity: mythic Cost: {1}{R}{W}{B} +2: Up to one target legendary creature gains vigilance

If that spell is countered this way

Set: Limited Edition Beta Type: Enchantment Rarity: uncommon Cost: {B}{B} {B}{B}: Counter target green spell

it's a land

Nightmare (119) [Unlimited Edition] XY BREAKthrough Set: Dominaria United Commander Type:Set: 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.