The Mbwiru Eikura -- roughly translated as The Unformed Lands -- is the foundation upon which the Umbaru Tribes base their belief system.
The Unformed Land is analogous to the afterlife of most other belief systems. It is conterminous with physical reality and is the source from which the Umbaru Witch Doctors derive their spiritual powers. Though specifics about this realm are few, it is populated by the deceased; Witch Doctors may contact their ancestors and recently deceased in this realm. Through elixers, powders and discipline, Witch Doctors interact with this world through a state of mind called Ghost Trance.