Odinani comprises the traditional religious practices and cultural beliefs of the Igbo people. Odinani has monotheistic and panentheistic attributes, having a single God as the source of all things. Although a pantheon of spirits exists, these are lesser spirits prevalent in Odinani expressly serving as elements of Chineke (or Chukwu), the supreme being or high god. Chineke is a compound word encompassing the concept of chí the divine masculine force and (nà) ékè the creative and divisive feminine force. The concept of Chúkwú ('supreme chi') was largely propagated by the Aro-Igbo of Arochukwu in eastern Igboland who wielded much spiritual force over the eastern Niger Delta in the 18th century due to their operating of the Ibini Ukpabi oracle.