Huntsman Markhor at Revantusk Village in the Hinterlands wants you to kill a Razorbeak Skylord and retrieve its Skylord Plume. Return to him once the task is complete. Markhor mentioned that the Razorbeak Skylord are a rare breed that tend to occupy the wilds of the Hinterlands.
The filth that calls itself Wildhammer trains gryphon to slay troll. Horrible, I know, but worry not, justice will soon be meted out.
For now, I want you to focus on eradicating the elder gryphons of the region. They are known as Skylords.
Slay one and return to me with its plume.