Arabella, Hope's Blade

+1: Create a 1/1 white Bird creature token with flying. You gain 1 life.
-2: Creatures you control get +1/+1 and vigilance until end of turn.
-5: Until end of turn, Arabella becomes a 7/7 red and white Angel creature with flying, lifelink, and double strike that's still a planeswalker.