In 1799, the southern part of Khimrathil was blanketed with giant boulders and tons of rock from what became known as the Great Ridgebone Quake. This crumbled a series of mountains and ridges, causing them to collapse into a great trench. The quake caused so much rubble to fall into the valley that the southern end became impassable. Over the next decade, Belgunth employed an army of Sussgurd slaves and skeletal minions, clearing a road, building spans across the trench towards the now exposed Pyramid of Anti-Nature.
Khimrathil and the Pyramid are claimed as territory of the city-state Sakullêth.