Creatures you control gain protection from non-Human creatures until end of turn.
9/22/2011 Only creatures you control when Spare from Evil resolves will be affected. Creatures that enter the battlefield or that you gain control of later in the turn won’t be.
9/22/2011 A “non-Human creature” is any creature that doesn’t have the creature type Human. A creature that is a Human in addition to other creature types is not a non-Human creature.