Will and Rowan, Duet

+1: Tap a number of creatures equal to the number of creatures you control. They don't untap during their controller's next untap step.
-3: Creatures you control gain +1/0, haste, and trample until end of turn.
-8: Search your library for any number of creature cards with mana value 3 or less and put them on the battlefield and shuffle. They gain haste.