Pei Jingque specialized in the Vermilion Bird Heaven-Burning Flame and was herself a master of Artifact Refining. Zhu Ju was knowledgeable and worldly, possessing his own unique insights into Artifact Refining.
The two shared the same idea.
Use a miniature sun to melt the Yin Sword and reforge the Sword Embryo.
Then, use the disassembled Three-Flame Simurgh Fan to carry Pei Jingque's Primordial Spirit into the Sword Embryo, forging a new Spiritual Artifact.
In theory.
This method should be flawless.
After all, it wasn't a major overhaul, but simply allowing Pei Jingque to reside within it as a Sword Spirit.
And since the Yin Sword had no Sword Spirit of its own, the fusion should be even smoother.
Underground.
The black longsword slowly melted under the intense heat, but pure physical energy could hardly affect the blade's foundation.
Spiritual Artifacts,
in essence, already contained the Great Dao.
The Great Dao is eternal!
