The shark is the most efficient hunters in the realms. This has empowered the Shark Spirit, to become the Beast Hunting Spirit. This powerful spirit has bound elementals of various kinds and places with a shark imprint. These bound spirits spawn new shark races: land sharks, sand sharks, sky sharks, and as for here, The OcrheMaws.
The Ocadian Desert is a desolate place. The spirit of the land has been crushed, changing the region from a series of islands with evergreen forests and animals in a shallow sea, to one of the most inhospitable places on the Sphere.
“Don’t be a Yak.” A common Ocadian saying.
The ochre sands stretch for miles around. Something kicks up the dust. It’s a yak. A desert-yak. It ambles slowly, nuzzling the ground for the low-growing shrubs. The ranger freezes. “Stay very still,” he warns. “Don’t move at all.” “What is it?” you ask, breathlessly. “It’s the most dangerous creature in the whole Ocadian desert. And it’s about to eat that yak…”
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.