Bring 15 Centaur Ears to Felgur Twocuts in Desolace.
Now that you scared the centaur clans, it's time to bleed them. When traveling Desolace, hunt centaur. I don't care which clan you hunt. Just gather ears. A hoard of ears.
By weakening their numbers you will weaken their resolve, and stamp out any thoughts of expansion.
Good hunting, [player].