The majority of the Nuba living in the east, west and northern parts of the mountains are Muslims, while those living to the south are either Christians or practice traditional animistic religions. In those areas of the Nuba mountains where Islam has not deeply penetrated, ritual specialists and priests hold as much control as the clan elders, for it is they who are responsible for rain control, keeping the peace, and rituals to ensure successful crops. Many are guardians of the shrines where items are kept to insure positive outcomes of the rituals (such as rain stones for the rain magic), and some also undergo what they recognize as spiritual possession.