Agwu Nsi is the Arusi of divination. The earth is inhabited by Agwu, a spiritual entity that goes beyond a mere force. Agwu possesses intellectual and volitive faculties, exerting significant influence on human affairs. Revered as the patron spirit of the dibia (diviner-healer) and the source of inspiration for exceptionally talented individuals, Agwu is closely associated with humanity's pursuit of fulfillment in society. It is believed that Agwu plays a role in enforcing various determinations, with the sick attributing their fate to him, creatively gifted individuals crediting his benevolent influence, and dibia being believed to be possessed by him. This page explores the nature of Agwu's possession, considering it as the culmination of his impact on human beings and examining its manifestation in individuals' experiences. Despite the transformative effects of modernization, Agwu's influence persists. Agwu is also known by other names such as Agwuisi and Agwunsi. While the popularity of these names may vary across different communities, there are no significant etymological differences among them. The simpler form, Agwu, encapsulates the complete essence of the concept. The suffixes isi and nsi, denoting head/first and poison respectively, serve as onomatopoeic expressions representing specific orders of relationships, characteristics, and effects associated with the spirit. Agwu is perceived as embodying tendencies that exhibit drastic moral opposites, often described in dialectical terms such as aka nri agwu (good/positive) and aka agwu (negative); ikenga agwu (support) and uruala agwu (subversion). Unlike other spiritual entities, Agwu is not characterized by a fixed inclination towards aiding or punishing, good or evil. Similar to spirits, Agwu has the capacity to both aid and punish. However, unlike them, he does not exhibit a consistent inclination in either direction.