Narset, Enlightened Master [Khans of Tarkir]

Set: Khans of Tarkir Type: Legendary Creature — Human Monk Mythic Cost: {3}{U}{R}{W} First strike, hexproof Whenever Narset, Enlightened Master attacks, exile the top four cards of your library. Until end of turn, you may cast noncreature spells from among those cards without paying their mana costs.