Doremy Sweet

+1: Create a 2/3 blue/black Nightmare creature token w/ "Whenever this creature attacks/blocks, each opponent exiles top two cards of their library"
-3: Return target nonland permanent to its owner's hand, then that player exiles a card from their hand.
-7: You may cast up to three spells from among face-up cards your opponents own from exile without paying their mana costs.