What's the Feather Bonus?
Feather Bonus is a fun way to get extra feathers for your birds when you level them up!
When a bird levels up, if you are lucky, you'll get the Feather Bonus, which will give you the chance to earn extra feathers for that bird.
The first pick is free and if you want to get even more feathers, you can pay extra gems to pick more cards.
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