{1}{snow}, {T}: Look at the top card of your library. If that card is snow, you may reveal it and put it into your hand. ({snow} can be paid with one mana from a snow permanent.)1
Illus. Thomas M. Baxa
7/15/2006: If the card isn't snow, you can't reveal it. If the card is snow, you don't have to reveal it. An unrevealed card stays on top of your library.