Sand Terror

Haste, Megamorph {3}{r}{r} ( You may cat 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.)
When you turn Sand Terror face up, target creature can't block our attack this turn.
At the beginning of your endstep, exile Sand Terror then return it to your battlefield face down.