Avirea, Aven Companion

+1: Target creature gets -2/-0 until your next turn. That creature gets -3/-0 instead if you control a Bird.
-1: Create a 1/1 white and blue Bird Companion creature token with flying. Then scry X where X is the number of Bird Companions you control.
-4: You get an emblem with "Whenever a Bird you control dies, draw a card."