Worth Its Weight in Gold

Archmage Malin sent Skuerto and I here to collect reagents for him. I was at a loss as to how I was going to collect the items, but now that you're here, I think my problem's solved. I need the following: Witherbark tusks, Witherbark medicine pouches and a shadow hunter knife. Could you find those for me? The Witherbark live to the southeast of Arathi.