Spectral Boon

Whenever a creature enters the battlefield under
your control, you may pay {g/u}{g/u}{g/u}. If you do
reveal the top card of your library.-
* If it's a nonland card, put a number of +1/+1 counters equal to the converted mana cost of the revealed card on that creature, then put that card
into your hand.
* If it's a land, put it on to the battlefield tapped.