With master-level alchemy skills, I, Feilong, effortlessly extracted the essence of the precious, rare, and expensive spirit herbs and spirit medicines, storing them in jade bottles inscribed with sealing formations.

Then, I gathered numerous low to mid-level spirit herbs and spirit medicines, extracting their essence and refilling the hollow shells of those precious, rare, and expensive herbs.

Finally, I infused them with a touch of mystic light power, completing the creation of a fake precious, rare, and expensive spirit herb that had lost its true efficacy.

Even a grandmaster-level alchemist wouldn't be able to discern that the herb had lost its potency.