-339 DR

Year of Sundered Webs
Ioulaum heads for his lair in the depths of the Northdark after abandoning his floating city as civil unrest reaches its highest levels across Netheril.

Karsus seizes Mystryl's powers but they are too great for him to control and the Weave fails, causing Netheril's floating cities to fall to the ground. Nhalloth and Sakkors plunge into the ocean. Mystryl saves Anauria, Asram and Hlondath, three of these floating cities, but in doing so sacrifices herself. She is reincarnated as the first Mystra.

The effects of the fall of Netheril are felt far and wide. The magical backlash from the death of Karsus causes magically supported structures in Calimport to fall, and the entire magically supported ceiling of the Sargauth Enclave collapses, covering two thirds of the city. Karsus's body falls to the east of the High Forest.

Netherese skyships head south to the Halruaan basin, led by the archwizard Raumark. Philock is found in the middle Underdark underneath the Wood of Sharp Teeth.

A large whirlpool from the surface to the mythal at Myth Nantar causes many ships to be lost and destroys many buildings in Serôs.