The underside of all discs of the Endlands, save the lofted disc, are a dark mirror of the topside. Just as each disc is ruled by a Vodun, the underside of each disc is ruled by their twin who matches them in an arcane ability and manipulation of Divine Essence. This is not true of the disc of Lêgba because he does not have a twin.
With the exception of Lêgba, Xêvioso, Gû and Sakpata, the Vodun struggle with their twins for control of the topside of their respective discs. Xêvioso, Gû, and Sakpata use the powers afforded to the Triple God to keep their twins at bay.
The Underside of Xêvioso’s disc is a land mired in chaos. Sakpata’s underside is a land that lacks solidity. Gû’s underside is gray and parasitic. Agê’s underside is a barren desert. Agbe’s underside is cold and icy. Jo’s underside is a void space. Lêgba’s underside is empty, white nothing.