Hero Feathers
Hero Feathers are items that can upgrade any character once they reach level 20. Below are the three methods that you can use to obtain them.
'Greet' Option:
Using the 'Greet' option towards anyone on your friends list tab.
Friends Leader:
Tapping on the main leader of your friends' party while they're visiting at the bottom of your Castle.
Talking
Talk with your Heroes (they will occassionally gift you with more Hero Feathers).
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