Maestro, God of Music

+1: Music battle ~ Until your next turn, whenever a creature an opponent controls attacks, it gets -1/-0 until end of turn.
-2: Reveal the top three cards of your library. An opponent separates those into two piles. Put one into your hand, rest on the bottom of library.
-8: For each player, search that player’s library for a nonland card and exile it, shuffle. You may cast those without paying their mana costs.