Often PCs get on the wrong side of powerful users of magic or break into enchanted tombs, either may get them on the wrong side of a curse.
Many roleplays are set in a world where much of the land is held by barons and other nobles serving under the King or Queen. Sometimes the PCs may need to meet these nobles to ask for help in their Quest, at other times they may be caught for breaking the law and end up with their lives in his hands. Yet nobles are different;some may be good people who care for those underneath them and are loved in return, others may be unpleasent tyrantts hated and feared by their underlings, and still others a bit of both. With this in mind I present thirty nobles
The desert is a curse from the Water God upon the wicked people who live in the South.
Said people offended the Water God in some way, and so the Water God placed water-trappers, bizarre, water-sucking beings, in the soil, and within years, the wilderness became a desert.
Thus, the desert folk shamans have special powers that allow them to find water-trappers so that they can be dug up and their water harvested.