Crux
Crux is the central region of the Underworld. The Scarlet Summits surround almost the entirety of the region, and the territory within is marred by deep gorges, smaller mountains and volatile wildlife. Travel here is very dangerous due to the sheer amount of cliffs. Despite the dangers here, the technology level here in some spots is relatively high, and the largest repository of knowledge in the Underworld besides Alakoth in Atria, is Sercep, the famed Neutral City.