"To use the heavens and earth as a furnace and the Five Elements as flame, one may forge the Heavenly Venerable Pill."
The *Great Heavenly Venerable Chapter* contains only one prescription, and the pill refined from it is called the Heavenly Venerable Pill. Its core spiritual ingredient is... the cultivator themselves. If one succeeds in refining it, they become a Heavenly Venerable.
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Chapter 258