Where to find Written Root
Forage it in the Ancient Ruins on mine floors 81–99. It is available in every season.
What to do with it
Donate one to the Ruins museum set. It is also used in woodcrafting, dragon-forging, Wheedle’s request, and the Mines Forageables Crown Request.
What is confirmed and what is not
This area and some listed uses are late-game spoilers.
Primary sources
Checked against these public pages. Official sources define confirmed features and status; community sources are labelled as such and used for game data that the developer does not publish directly.