To generate a Golden Core, creating another one by Zheng Fa himself is not feasible; he has never heard of the existence of a Double Yellow Pill in the Xuanwei Realm.
The only option is to follow the path of outer elixir, which requires an alchemy furnace.
Therefore, this object could be called the mother machine of modern Cultivation industry.
Once the alchemy furnace was ready, Zheng Fa didn't delay; he directly used it to craft a Shenxiao Outer Pill.
Now, crafting Shenxiao Outer Pills poses little challenge to him, but Zheng Fa still feels a twinge of pain when he looks at the outer elixir:
After all, the real mother machine of the Immortal Dao industry is himself.
Be it the alchemy furnace or the outer elixir, they both consume the spiritual material particles inside his body, or rather, they consumed his Heavenly Gang and Earthly Sha energy.
