Serav, Route Finder

Lifelink, reach, prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until
end of turn.)
Navigate {g}{w}{u} ({g}{w}{u}, Exile this card: Reveal the top card of your library until you reveal a land card. Put that card onto the battlefield and the rest on the bottom of your library in any order.)
You may cast Serav, Route Finder from exile.