Collect 5 Grishnath Orbs and 5 Dire Pinfeathers and then combine them into Exorcism Feathers.  Use these feathers to exorcise and slay 5 Koi-Koi Spirits from the Raven's Wood Leafbeards.  Once you've done this, return to Treebole in the Raven's Wood of the Blade's Edge Mountains.