Kiyar, Prophet Empyrean

Flying, Hexproof
When Kiyar, Prophet Empyrean enters the battlefield, you may reveal the top card of your library. If it's an instant or sorcery card, you may
cast it until end of turn.
When Kiyar attacks, exile it. Return it to the battlefield under your control tapped
and attacking at the beginning of the declare attackers step on your next turn.
When Kiyar leaves the battlefield, scry 2.