Someone said this on page two: Give it both momentum and immaterial. Yes, I know it is a rock (quite material), but then again flying creatures die in a flood.. Other than the logic imperfection, it would be fine and not UP or OP.
I agree. But it should really be a spell, because
a. It's not living (yes I know other creatures on this game aren't alive either, but still.)
b. People could buff it (very dangerous)
c. It's an immediate effect, thats it. That's the definition of spells on this game.