Ae'ir of the Storm's Song

+1: Create a white and blue bird creature token with Flying, then put a +1/+1 counter on target creature you control.
+2: Until the start of your next turn, Ae'ir becomes a 4/4 Aven creature with Flying, First Strike, and Indestructible.
-8: You get an emblem with "Creatures you control get +1/+1 and gain Double Strike."