Nightmare [Limited Edition Beta] Avatar put all cards exiled with

put all cards exiled with Knowledge Vault into their owner's graveyard

you may skip that turn instead

They each have flying and "This creature can't be enchanted

if you have the city's blessing

Nightmare [Limited Edition Beta] Avatar put all cards exiled withSet: Limited Edition Beta Type: Creature Nightmare Horse 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.