The Spear Masters of the Dinka Tribe of the upper Nile are a hereditary priesthood, and according to mythology, their presence is reinforced by political and religious ideals.
There are several legends of the origins of these spear using masters, one in which includes a lion and a man dancing. The lion demands a bracelet that the man is wearing and he refuses. In return, the lion bits off his thumb in order to claim what he thinks belongs to him and the man dies during the confrontation. The man leaves behind a wife and daughter with no son. The daughter weeps at the river and the spirits ask her why she cries.
Whether myth or a historical fact, the spear masters evolved from one man's secret to make things happen.