The Millennial Corpse Poison is a type of corpse poison, even more terrifying than one of the Tang Sect's secret poisons, the Decaying Corpse Poison. Its creation is inseparable from corpses, but not just any corpse—the poison from an ordinary corpse isn't potent enough, hence aged corpses that have been dead for a long time are needed. However, ordinary corpses cannot exist for too long, so one must artificially create a corpse that has 'existed' for a prolonged period.
Therefore, Xiangyang found the whirlpool in the Ghost Gate Gorge and threw corpses into it to produce qualified bodies.
Below the whirlpool in the Ghost Gate Gorge, yin energy that has accumulated for thousands of years is present. Submerging a corpse there, the body would be steeped in that environment, contaminated by the yin energy, making it as though the corpse had existed for a millennium. The corpse poison made from such a body is called the Millennial Corpse Poison by the generation of zombie herders.
