Board Thread:General Discussion/@comment-25155237-20150327170542

We know that when we get a bird, we get feathers to power up the birds.

When you get 100 feathers, it will upgrade to bronze.

When you get 250 feathers again, iy will upgrade to silver.

You get the feathers in the chest which gives to random birds and arena which give to one specific bird that day.

Should we put this information to a new page or in http://angrybirds.wikia.com/wiki/Angry_Birds_Under_Pigstruction ?

extra: the fifth spell is mighty eagle, but I don't know what is the mame of it. 