Plagueland

Plaguelands was a term used to refer to areas or regions where pockets of Spellplague persisted after the Wailing Years. Creatures that ventured close or into the plaguelands could gain spellscars or be transformed into plaguechanged horrors. The Order of Blue Flame often sought out plaguelands in what were referred to as Scar Pilgrimages. The Abolethic Sovereignty was also interested in study, cultivate, and expand existing plaguelands.

As of 1479 DR, the largest plagueland was the Plaguewrought Land, located in Interior Faerûn, south of the Vilhon Wilds.

After the Second Sundering, most plaguelands returned to normality as the effects of the Spellplague ceased to be.

Description
Plaguelands were shrouded by a luminous, liquid blue fog, and the surrounding terrain was sharp-edged and clear. Inside the plagueland, the land was mutable, like boiling mud. Earthmotes were common across the terrain, as well as immense zones of blue fire. Reality was in flux, and all features, such as the terrain and the sky, were somehow mixed forming an alien landscape.