Frostwind Cryomage

Frosttouch (Whenever this creature deals damage to
a creature, tap that creature. It doesn't untap during
its controller's next untap step.)
Morph {1}{w}{u} (You may cast this card face down as
a 2/2 creature for {3}. Turn it face up any time for its
morph cost.)
The sight of winter is alluring and magical,
promising wonder and adventure. But the touch of
winter is a nothing if not cruel.