This system allows you to acquire extra CP in your character by adding some extra boost in your wings.
Your wings holds 3 different stats namely Defense x 2, HPx2 , Attackx2 for a total of 6 stats in your wings.
Starting wih defense the other stats will unlock when you level up the previous stats before them.
You can increase the stats level by using Gold Coins and Feather soul.
The stat maximum level follows your character level. Meaning to say if you are level 20 then you can only increase the stat level to 20.