Colonel Skagos, Madman

+1: Create a 2/3 Agent of the Cult token with "Whenever this creature attacks or blocks, each opponent exiles the top 2 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.