Nightmare [Revised Edition] XY08 you can take control of

you can take control of That monster up to the End Phase

Set: Sun & Moon: Black Star Promos Type: Lightning Rarity: Black Star Promo

Set: EX: Holon Phantoms Type: Psychic Rarity: Secret Rare Retreat cost: Colorless

also this card gains 200 ATK for each monster destroyed this way

you win the Duel

Nightmare [Revised Edition] XY08 you can take control ofSet: Revised 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.