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'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.
'[+2]: Exile the top three cards of target opponent's library. [−X]: Put a creature card with mana value X exiled with Ashiok onto the battlefield under your control. That creature...
'Target creature becomes blue until end of turn. Untap that creature.
Draw a card.