367 A Coffin

He Ping called these azure pills "Yin Lifespan Pills." Every Yin Lifespan Pill was refined from ferocious corpses and zombie baleful entities through secret rituals, while the remaining corpse ash was made into incense pellets. Later, he obtained Dugu Lin's handwritten notes and learned a passage of the Yin-to-Yang Conversion Method. Thanks to this method, the uses of Yin Lifespan Pills multiplied. Besides increasing one's cultivation of magical power, they could heal injuries and assist in condensing the Yin Spirit.

Most importantly, the Yin-to-Yang Conversion Method itself had no side effects whatsoever. When paired with Yin Lifespan Pills condensed from extracted yin lifespan, it was practically omnipotent.

The only issue was that refining Yin Lifespan Pills required materials such as walking corpses and shambling zombies. The older the zombie, the better the Yin Lifespan Pills produced.

If the zombie had once been the body of a cultivator, the effect received an additional boost. Burying it in a corpse-nurturing ground could also speed up its growth.

In the Southern Frontier, He Ping had subdued the local Empty-Hand Sect and transformed it into the Star-Plucking Alliance. After his trip to the Abyssal Realm, he secretly ordered the Star-Plucking Alliance's leader, Yu Buxin, and Daoist Yunji to scour the vicinity of Nanling Circuit for zombies or cultivator corpses, specifically to refine corpses and secure an ample supply of materials for Yin Lifespan Pills.

He Ping did not intend to keep Yin Lifespan Pills merely for his own private use. He had an idea—to turn them into a special material, or rather, a product.

Corpse-refining methods were not particularly difficult. As long as one had corpses, they could be made. However, refining high-grade corpse baleful entities for pill-making required both quantity and quality, and at present, the Star-Plucking Alliance could not provide goods on