Dragonlord Atarka is a mythic Legendary Creature — Elder Dragon card from The List (PLST), collector number DTK-216. Current market price: $13.29, TCGplayer market prices via Scryfall.
Flying, trample When Dragonlord Atarka enters, it deals 5 damage divided as you choose among any number of target creatures and/or planeswalkers your opponents control.