Nightmare [Revised Edition] Fighting[×2] Metal[×2] during either player's turn: You

during either player's turn: You can detach 1 Xyz Material from this card to target 1 card on the field

Armageddon Clock deals damage equal to the number of doom counters on it to each player

except "Kitchen Dragonmaid"

Set: EX: Delta Species Type: Water Rarity: Promo Retreat cost: 1

and remove it from combat

Nightmare [Revised Edition] Fighting[×2] Metal[×2] during either player's turn: YouSet: 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.