Krosan Colossus is a uncommon Creature — Beast card from Masters 25 (A25), collector number 177. Current market price: $0.10 (foil $0.25), TCGplayer market prices via Scryfall.
Morph {6}{G}{G} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)