Unlike the Zhang Family's alchemy, the Old Dan King's elixirs are famed for their potent ingredients and genuine quality.
In the beginning, the Old Ginseng used by the Old Dan King in Black City was all superb quality, over ten thousand years old.
Back then, the Secret Realms newly developed around Black City had old ginseng which was easier to find, so the materials used were really intense, all of them were genuine old stocks.
As the Secret Realms were continuously developed, various Heavenly and Earthly Treasures gradually became scarce, and over these hundred years, the Old Dan King's materials have also become increasingly lacking.
From the initial ten-thousand-year-old ginseng to thousand-year-old ginseng, then to hundred-year-old ginseng, until in the end, they could only use a decade-old ginseng.
