Teati, Mystic Manipulator

Whenever a nonface-down creature enters the battlefield under your control, you may manifest the top card of your library. (Put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if
it's a creature card.)
All face-down creatures have a morph cost of {1}{u}{g} (Turn it face up any time for its morph cost.)