This a post-game quest in The Legend Of Chipi
How to get questEdit
Talk to a lady in The Hall Of Origins, and she tells you to go get some wings for her "offer" to the "gods"
How to completeEdit
The Wings can be found in seaside cave B4 kill 10 salamanders to get all 10 wings
She will then say "ここに聖なる神ああすることはあなたに私のオファーです" if in the English version of the game she says "O holy gods here is my offer to you" so now she gives you a gargoyle sword as a reward.