Krosan Colossus is a rare Creature — Beast card from Murders at Karlov Manor Commander (MKC), collector number 176. Current market price: $0.29, 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.)