Strig, Empyrial General

If an effect would put one or more feather counters on a bird you control, twice that many feather counters on that bird instead.
Whenever Strig, Empyrial General attacks, put a feather counter on target bird.
Remove a feather counter from a bird you control: Strig, Empyrial General fights target creature.
I need no sky when I have my brothers.