Looter's Bane

{t}: Add one mana of any color to your mana pool.
Morph {3} (You may cast this face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)
{3}{t}: Turn this card face down as a 2/2 creature. If you do, target opponent sacrifices a creature. You may turn it face up any time for its morph cost.