You found a book explaining a method of refining Odium. Deliver the book to Leto in Tolbas Village.
Step 1. Deliver the book to LetoA Guardian in front of the Nobelium of Tolbas Village in Verteron. She was dispatched from Verteron Citadel. in Tolbas Village.
Step 1.1 In the north part of Dukaki Settlement is a scroll Order of the Dukaki Tribe on top of a stump.