Board Thread:Lore Discussion/@comment-92.232.245.173-20140202220612/@comment-24459775-20140305213137

I've always thought Blighttown was the remains of the Great Swamp, which later became infected by Eingyi and his pyromancies, mutating the inhabitants and leading to the condition of Quelaags sister, who devoured blight pus. The proficiency of Pyromancers of the Great Swamp also attests to this, with the close proximity of Lost Izalith and the presence of Quelana they would surely be better than other students of pyromancy