You may cast creature spells as though they had flash.
+1: Until your next turn, up to one target creature gains vigilance and reach.
-2: Look at the top three cards of your library. Exile one face down and put the rest on the bottom of your library in any order. For as long as it remains exiled, you may look at that card and you may cast it if it's a creature card.
Quote from Rosy Dumplings »pretty cheap and effective.
What really impresses me, however, is that wizards found the proper formatting to do an adventurous impulse effect that doesn't require you to reveal the card.