After the sorceress Rigalene died, those going through her estate were puzzled. Where were all her books? And how would they find homes for all these cats?
How the Clerics of Stone cheat death.
Everyone knows that firearms are weapons only fit for orcs—smelly, loud, and unreliable. But there are guns made for ogres, too, and the largest of those are called Thunderguns.
The local band of 'nasties' (goblins / orcs / whatever) lives in relative peace with the local population.
Along come the PCs and go through their usual heroic monster bashing routine, wiping out the nasties and pinching all their stuff, then continue on their way.
Problem is, they don't kill ALL he nasties. The survivors want revenge and, after spending a few months recovering, start to take it in their own inimitable style (which is not unlike that of the PCs come to think of it).
Next time the PCs are in the area they find themselves VERY unpopular with the townsfolk.