Serala, Angelic Superior

+1: Demons and Zombies get -2/-1 until your next turn. Humans and Angels get +1/+1 until end of turn.
-1: Reveal the top two cards of your library. You may put a Human or Angel from among them into your hand. Put the rest on the bottom of your library
-7: Search your library for any number of Angels and put them onto the battlefield under your control. Then shuffle your library.