Styx

(Στύξ) - The region within Underealm surrounded by Phlegethon.

Στύξ
The region within Underealm surrounded by Phlegethon.

Spoilers
Warning, Major Series Spoilers ensue... Peruse at your own risk: ====== A New Kharon Series ====== n/a

Real World Influence
Wikipedia:Styx In Greek mythology, Styx is a deity and a river that forms the boundary between Earth and the Underworld. The rivers Acheron, Cocytus, Lethe, Phlegethon, and Styx all converge at the center of the underworld on a great marsh, which sometimes is also called the Styx. Styx is also a goddess with prehistoric roots in Greek mythology as a daughter of Tethys, after whom the river is named and because of whom it had miraculous powers.