Mossy Horror is 6 mana

Where is Godfrey and Rin? I feel like this isn’t a control deck without them.

Oh I see now. I was going off the Nax Treants. In that case, the card seems very slow if they will be 2 mana each.

I think you guys are forgetting the Treants are 1 mana cost. So if you play this on turn two (if you have it in hand), then next turn you can play 3 mana 6/6 worth of stats on the board. Not too shabby but leaves you empty on turn 2.