Nebt-Setau (pronounced NEBT-seh-TAU) is an azarketi Khapeshan wizard. In Y9928*, seeking to drive out what she saw as the land-dwelling peoples slowly destroying her ancestral homeland and planning to establish her own watery dominion, Nebt-Setau opened rifts to the Plane of Water just offshore from Akhom, exploiting the thin planar boundaries at these locations. Water rushed into the Material Plane, quickly overwhelming the coastal cities in an incident that would become known as the Deluge.
In Y9930* Nebt-Setau was apprehended by Zandroanyx and imprisoned in Atonement, where she has remained to this day.