Marang River Skeleton is a uncommon Creature — Skeleton card from Dragons of Tarkir (DTK), collector number 108. Current market price: $0.13 (foil $0.29), TCGplayer market prices via Scryfall.
{B}: Regenerate this creature. Megamorph {3}{B} (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.)