 Nzu is used in rites from birth to death and is used to mark sacred buildings and spaces.Agwu Nsi is the Igbo patron deity of health and divination and is related to insanity, confusion, and unusual human behaviour which is linked to possession of Agwu by the diviner.Agwu can be manifested by other alusi so that there could be images of a divination Ikenga or "Ikenga Agwu" for instance.