The fire source of the alchemy furnace can be earth fire, sky fire, dao fire, or even mortal fire.

Except for some special big pills, the general pill refining has no special requirements for the fire source, and the fire source used in the Dan furnace in the Huanglongguan alchemy room is ordinary fire.

The so-called mortal fire is not a fire burned with charcoal, but a spiritual fire formation is arranged in the Dan furnace, only a steady stream of spiritual energy is needed to keep the spiritual fire from extinguishing, each kind of elixir, the refining time is long and short, the short one or two hours can be refined, and the long one is not fixed, and it is rumored that there are pills that have been refined for hundreds of years.

In the process of alchemy, it is used to control the power of spiritual fire......

"I Am an Immortal Armor" Chapter 161 Alchemy is in the middle of the hand, please wait a moment,

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