Nauyei, Always Famished

+3: Each opponent sacrifices a permanent with the highest converted mana cost among permanents they control at random.
-5: Exile the top three cards of your library. Until the end of your next turn, you may play those cards without paying their mana costs.
-12: You get an emblem with "Whenever you draw a card, you may play a spell from your hand without paying its mana cost."