Momo never expected it, and no one else did either, that Kong Xuan would possess such a thing. The ancient rot-worm, also known as the bone-worm, is a type of insect bred from the uncorrupted skeleton of a cultivator after their death. To successfully raise such a creature, a single cultivator's remains alone are not enough; it also requires the right timing, geographical advantage, and harmony of people. In other words, the breeding ground required by this rot-worm is a cultivator's skeleton, combined with extremely dense spiritual energy. This means the place where the cultivator passed away must be right at the eye of a Spirit Spring, so that even after death, the spiritual bones would not be weathered or corroded, providing a place where the rot-worm could be nourished.
Perhaps to ordinary mortals who do not understand, or even to some cultivators unaware of the situation, the flesh and bones of fallen cultivators are thought to be immune to weathering, but that is actually impossible. One can only say that the higher a cultivator's cultivation level, the longer the weathering process takes. At the deity level, the flesh might decay, but that takes millions upon millions of years; yet a deity's bones will never rot under any circumstances, and as long as they do not encounter special destruction or deliberate ruin, they can endure forever.
Of course, cultivators below the divine level cannot achieve this.
Chapter 1061