Board Thread:General Discussion/@comment-33410471-20171019104424/@comment-28789107-20171019141653

You can search for "rewarded" items in the collections list. Searching "Winding key" shows 16 collections which give them. Many for Diagram too. There are a few for flowers, flasks and runes also.

I've had good success with the Artifacts that Swansong mentioned.

Game Name - Hoppy