The Weyward Sisters

Bubble, Bubble, Toil and Trouble - You may look at the top 3 cards of your library any time.

Something Wicked This Way Comes - As long as
you are the monarch, you may Foretell the top card
of your library. It's Foretell cost is equal to its mana cost, reduced by {2}.

{1}{p/b}{p/b}{p/b}, {t}, Sacrifice a non-token creature:
you become the monarch. Activate only as a sorcery.