Advancing the Infernal Flame Sea Earth Vein

"Let us give it a try and see whether this can advance the fire vein."

Chen Nianzhi did not delay any further. He immediately handed the Primeval Flame Devil Heart to the old clan chief.

Chen Changxuan took the Primeval Flame Devil Heart. After making a brief calculation, he said, "If we refine this object with the Immortal Ascension Meridian-Forge Grand Formation, it can promote the advancement of the Bing-Fire Immortal Jujube Tree and also drive the earth vein's advancement."

"However, with my current cultivation, refining it will likely be difficult."

Chen Nianzhi nodded and said, "I will assist you with Pure Yang Heavenly Fire. We should be able to refine it within three years."

"That is our only option."

Having made up their minds, the two began advancing the Infernal Flame Sea earth vein.

With Chen Nianzhi's assistance and the refinement of the Primeval Flame Devil Heart using Pure Yang Heavenly Fire, they spent roughly three years before finally refining the Primeval Flame Devil Heart completely.

Once it had been refined, Chen Changxuan immediately used it as the formation core for the underground fire vein, drawing in the boundless power of the subterranean fire veins.

A stream of incomparably pure Pure Yang Fire essence flowed from the Primeval Flame Devil Heart.

This object contained most of the essence of a peerless Ninth-Level Primordial Spirit existence. Its fire essence was so pure and abundant that it could forcibly burst a Primordial Spirit cultivator apart.

Under Chen Changxuan's guidance through the formation, that vast power split into three streams, merging respectively into the Bing-Fire Immortal Jujube Tree, the phoenix egg, and the source of the fire vein.

"Rustle, rustle—"

After absorbing the immense Pure Yang Fire essence, the branches and leaves of the Bing-Fire Immortal Jujube Tree rustled. A faint divine