I have heard (from an Afghan man that I know) that in Afghanistan, they will construct kites, and then tie or tape pieces of glass and shards of pottery to the kite-strings and have "kite-battles", where they try to use the sharp shards on their kite-strings to cut the opponent's strings.
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.
Could be used for killing a certain animal...a prized animal. The bones must be carefully buried or disposed of lest a sorcerer get a hold of it. With the bones of the dead creature the sorcerer can kill the hunter.