Dirgur Nemesis is a common Creature — Serpent card from Dragons of Tarkir (DTK), collector number 51. Current market price: $0.05 (foil $0.15), TCGplayer market prices via Scryfall.
Defender Megamorph {6}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.)