Dack, Fierce Captain

+1: Exile the top card of your library. If it's a nonland card, you may cast that card as long as it remains exiled.
-4: Gain control of target creature. Untap that creature. It gains haste until end of turn.
-7: You get an emblem with "Whenever an opponent casts their first spell each turn, gain control of it. You may select new targets for that spell."