The Darkblight infects the deepest reaches of the Fangwood in Nirmathas. Cruel, evil fey, children of the corrupted dryad Arlantia, live in the dead trees and form her army. It is unknown if the corrupt dryads damaged the trees, or if the trees caused the dryad's corruption. These areas also contain Arlantia's victims, who are said to be bound and somehow converted into shambling mounds.
The Darkblight first appeared in 4062 AR, and its spread led to the fall of the fey Accressiel court that ruled over the Fangwood for millennia. The court's queen, a glaistig named Gendowyn who formed and had ruled over the court for nearly 8,000 years, became Arlantia's prisoner.