The Mightiest is a Tome of Knowledge Bestiary entry for Griffon.
Instructions: Order & Destruction
Kill/talk to the Champion Griffon "Grimwing" in Eataine at 53k 64.2k.
- Title: The Majestic
- XP: 204
In front of him, you will find a Hero Treekin "Irebough Mossroot" for the unlock Timber!.