Dragonlord Atarka [The List] Rat Mutant The Nightmare arises from its

The Nightmare arises from its lair in the swamps

and "this turn" and "until end of turn" effects end

then sacrifice it unless you pay its upkeep cost for each age counter on it

That creature's controller creates a 3/3 green Frog Lizard creature token

Set: Secret Lair Drop Promos Type: Enchantment Rarity: Rare Cost: {1}{R} Cumulative upkeep—Add {R}

Dragonlord Atarka [The List] Rat Mutant The Nightmare arises from itsSet: The List Type: Legendary Creature Elder Dragon Rarity: Mythic Cost: {5}{R}{G} Flying, trample When Dragonlord Atarka enters the battlefield, it deals 5 damage divided as you choose among any number of target creatures and or planeswalkers your opponents control.