Emile's Incertitude

Reveal the top cards of your library until you
reveal a nonland card, then shuffle your hand
and the cards revealed that way into your library.
Draw 7 cards.
Flip a coin.If you win the flip, until end of turn,
you may reveal the previously revealed nonland
card. If you do, you win the game.
Otherwise, reveal your hand. If the nonland card
you previously revealed is in your hand, you lose
the game.