Nicol Bolas, Deathspark

+3: Each opponent reveals their hand. Choose a card from each opponent and exile them.
-2: Until end of turn, you may play cards exiled with Nicol Bolas, Deathspark. If those cards would be put into the graveyard this turn, exile them.
-7: Target opponent reveals the top seven cards of their library. You may play any number of those cards this turn without paying their mana cost.