i got a little paper as drop named ‘Harvest’;
-txt said i should unfrill it.
-got me a new pennant.
-i looked it up and found info, saying that it is a very rare drop from a Shaman boss.
-i never heard of it, who did? 
Heard about but never even tried looking for it.
I’m not much into pennants tbh.
I remember when I found it after a few days of grinding for it:
Wish the cosmic wings were as easy.
Harvest Pernnant:
Drops from Graw the Herald in the Stinging Winds.
Anyone that has checked the Wings and Cosmetics Guide. And those that were around when it was introduced into the game (it didn’t get much fanfare afterward, obviously).