Duan Ling Tian had learned about the Psychic Pill from the World Cleansing Divine Water when they were still in the Devata Realm. He had learned that only medicinal herbs found in the Realms of Gods could be used to refine the Psychic Pill, a divine pill. Moreover, the alchemist had to possess a divine flame in order to refine the pill.
A decent alchemist in the Realms of Gods most likely possessed a divine flame. Even if they were not highly skilled in the law of fire, most of them were still skilled compared to the average person. This was because one had to be skilled in the law of fire to become an alchemist in the Realms of Gods. Alchemists in the Realms of Gods were also known as divine pill alchemists.
