The Reality Stone

The Reality Stone does not count as a card in you
deck.
At the beginning of the game, exile The Reality
Stone from your library face down.
At the beginning of your end step, you may
discard a card. Then, if you have no cards in
hand, put The Reality Stone face up onto the battlefield under your control.
{1}{t}: Sacrifice The Reality Stone: Exile all
nonland permanents.