| Category | Wastelands |
| Continent | Amachan |
| Region | Padimza |
| Map | Derqamuz |
Gestosu harbors two sizable Shou ruins that were once thriving metropolises. During the latter centuries of the Horgon Era, these city-states succumbed to the Dead Ancestors and raids by the tyrant Tiya'lith, the same individual who would later establish the Tiya'lith Empire. By the start of the First Epoch, the Shou population of Gestosu had been driven southward into Kalaran, leaving the valley a desolate wasteland of death and decay, devoid even of Tiya'lith interest in claiming it as territory.
In the Horgon Era, Demacian shamans utilized magic to interweave the essence of Shou spirits into their armor. This practice of despoiling spirits and binding them, rather than allowing them to wander freely, was an affront to the Shou. This gave rise to a profound enmity between the two peoples that has persisted to this day. It also led to the defilement of Gestosu and the creation of powerful undead whenever someone wearing Gestosu Chain perished. Some of the undead that have risen from the bleak plains of Gestosu have become Dead Ancestors - these formidable undead lords are engaged in an unending war with the peoples of Shounejo and Tiya'lith.