However, raising a low-grade divine artifact to a high-grade divine artifact was by no means easy.
It required many rare heavenly materials and earthly treasures as supplementary materials, as well as an extremely demanding forging environment.
And a complex forging process that was almost akin to the Dao.
The difficulty involved was beyond imagination.
With the slightest mistake, not only would the spirit liquid lose its effect, but the Sky-Piercing Divine Sword itself might even be damaged or utterly destroyed.
Risk and opportunity coexisted, but Yang Lingtian had never feared a challenge.
"A high-grade divine artifact—I'm determined to obtain it!" he muttered.
He began carefully sorting through the information provided by the system, listing the supplementary materials one by one.
Nine Heavens Profound Iron, Earth Core Lava Essence, Ten Thousand Year Star Stone, Void Divine Gold...
Every one of these materials was enough to drive countless cultivators mad.
They were all top-tier materials for refining divine artifacts, and unimaginably rare.
Fortunately, the resource gift package from the system's previous rewards had been a tremendous help.
It contained most of the rare ores he needed, but there were still some he had to find himself.
For the Chaos Sacred Sect, which now controlled nine subordinate forces, this was no difficult task.
With a single order, the entire Azure Domain's power would be at his disposal.
Before long, the few missing materials were delivered before him.
The materials were now complete. Next came the choice of a forging site.
The system's information had mentioned that raising a divine artifact's grade required the aid of the most violently yang and unyieldingly fierce flame power in heaven and earth.
Ordinary flames were utterly incapable of melting those top-tier materials, much less drawing out the full potential of the Divine Artifact Enhancement Spirit Liquid.
Yang