Sandman, Ruler of Dream

Whenever Sandman, Ruler of Dream deals combat damage to a player, you may pay {2}{u}. If you do, exile the top card of your library face down.
You may look at that card for as long as it remains exiled. You may play that card without paying its mana cost for as long as Sandman remains on the battlefield.

"Love is not part of the dream world. Love reinforces desire, and Desire is always cruel."