Timber!
From RoR Wiki
Timber! is a Tome of Knowledge Bestiary entry for Tree Kin.
Instructions: Order & Destruction
Kill "Irebough Mossroot", a level 40 Hero Treekin, in Eataine at 53k 63.2k.
Rewards
- Bestial Token
- XP: 806
Tip
In front if him, you will find a Champion Manticore "Grimwing" for the unlock The Mightiest.