Zephyra, Sparked Blade

+1: Elves you control gain vigilance and haste until your next turn.
-4: Exile a creature from your hand. Place X +1/+1 counters on each creature you control, where X is the exiled creature's toughness.
-7: You get an emblem with "each creature you control with a +1/+1 counter on it gains vigilance and double strike."