Marsh Hulk is a common Creature — Zombie Ogre card from The List (PLST), collector number DTK-109. Current market price: $0.22, TCGplayer market prices via Scryfall.
Megamorph {6}{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.)