According to the classics, in the northern part of the once Wilderness, there was a small blessed land where White Soil was produced.
The livelihood of the people living there was akin to gold panning, except they were panning for White Soil to sell to the people of the Lihuo Institute.
The annual output there wasn't even enough to nurture a single seedling of Heavenly Materials and Earthly Treasures, yet even this was considered exceptionally high.
The reason it can be seen in the classics now is partly because the Wilderness has long been abandoned, and partly because that small blessed land has also collapsed...
The White Soil that the Lihuo Institute has today is all from their stock, reducing with each use, and acquiring new White Soil from other places is akin to saving up to buy a three-entry courtyard on the edge of the palace city, purely for amassing resources for the descendants.
