Mercurial Outcast

Morph {1}{u} (You may cast this face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)
As Mercurial Outcast is turned face up, it be becomes the choice of 4/1, 1/4, or 3/3.
{1}{u}: Turn Mercurial Outcast face down.
"Nothing is eternal, but change."