Eshki, Temur's Roar is a mythic Legendary Creature — Human Warrior card from Tarkir: Dragonstorm Commander (TDC), collector number 3. Current market price: $2.50 (foil $0.58), TCGplayer market prices via Scryfall.
Whenever you cast a creature spell, put a +1/+1 counter on Eshki. If that spell's power is 4 or greater, draw a card. If that spell's power is 6 or greater, Eshki deals damage equal to Eshki's power to each opponent.