Rita, Woman of Wonder

+1: Exile cards from the top of your library until you exile a card with mana value more than Rita's loyalty. Put a Life bond counter on that card.
-X: Until end of turn, you may play cards from exile if they have a Life bond counter on them. They each cost X less to cast.
-7: Exile the top 10 cards of your library. Put a Life bond counter on them. Then, if you have no cards in your library, you win the game