Teferi, Hero of Dominaria [Mythic Edition] Human Cleric Nightmare's power and toughness are

Nightmare's power and toughness are each equal to the number of Swamps you control

if you control four or more Demons with different names

Set: Magic 2015 Type: Enchantment Rarity: Rare Cost: {1}{B} Whenever an opponent discards a creature card

in this time of rebirth

As brilliant as a cut diamond

Teferi, Hero of Dominaria [Mythic Edition] Human Cleric Nightmare's power and toughness areSet: Mythic Edition Type: Legendary Planeswalker Teferi Rarity: Mythic Cost: {3}{W}{U} +1: Draw a card. At the beginning of the next end step, untap up to two lands. 3: Put target nonland permanent into its owner's library third from the top. 8: You get an emblem with "Whenever you draw a card, exile target permanent an opponent controls."