The Mbwiru Eikura, roughly translated as "the Unformed Land," and sometimes called the "Spirit World," is an otherworldly realm, according to the Umbaru. It is the central tenant of their belief system, the belief that the mortal realm is merely a veil for the true reality that is the Unformed Land. It is through the Witch Doctors that the Umbaru gain insight into the realm, who can purportedly see and experience it, in a state they call the Ghost Trance.
According to the Umbaru, gods dwell within this realm, their life force flowing from the Unformed Land into Sanctuary. Thus, the Umbaru hold ceremonies involving ritual sacrifice to keep this life force flowing. Among these gods is Giyua, who is said to greet the spirits of the departed once they enter the realm.