From a low hillock in a vast plain, the entrance to the Noil Ruins is as unobtrusive as it is a gateway to wonder…
The Pelezians, or “clay people” were strongly bound to the earth. In fertile plains and valleys they lived their happy existence, peaceful, yet ever on their guard. Many nomadic attackers they defeated, until a different enemy came; their advanced technology and weapons (and magic) were beyond the skills of defenders. One-by-one their settlements fell, until the clay people were not more.
To the greedy students of the past, their heritage is but not forgotten.
A plague has hit the local area.
In humans it affects only the most vulnerable, the children and the very old, and even than it's little more than a summer cold. 24 hours of sniffles and then it's gone, barely noticeable really.
To sheep however it is fatal and the whole economy of the area is in serious trouble. If this keeps up the area could well be facing famine.
Somebody (enter the PCs) must find the rare herbs needed to make a cure.