Soul Power grade!
Ye Zhen felt that his rapid progress in artifact refining was likely related to his Four-colored Innate Soul Light grade!
Under normal circumstances, according to Earth Core Fire Marshal's records, as a beginner in artifact refining, Ye Zhen would need at least a year to become proficient at refining Treasure Artifacts and raise his success rate above seventy percent!
The Profound Heaven Artifact Refining Art contained a vast number of Earth Core Fire Marshal's artifact-refining notes. These notes provided Ye Zhen with precious experience from those who had come before, greatly accelerating his progress in artifact refining, but even so, it should have taken half a year.
After all, artifact refining was something that required one to personally experience and comprehend the lessons of one's predecessors.
Besides that, Ye Zhen's flame was a Heaven Grade flame. However, this did not have much impact on his progress in artifact refining. Heaven Grade flames mainly affected the quality of the materials and the speed of refinement.
For refining Treasure Artifacts, Earth Grade flames were already sufficient. Let alone Heaven Grade flames, even if Ye Zhen possessed Spirit Grade flames or flames of even higher quality, they would not raise his artifact-refining success rate by the slightest bit!
On the contrary, Ye Zhen felt that Soul Power was the key!
The difficult points and essentials of inscribing formations recorded in Earth Core Fire Marshal's artifact-refining notes were as simple as eating and drinking to Ye Zhen.
For example, the Gale Formation, which increased a Treasure Artifact's speed, required three formation pathways to be inscribed simultaneously. There could not be the slightest discrepancy in weight, thickness, or fineness for it to succeed.
Normally, practicing this Gale Formation alone would take half a month. Earth Core Fire Marshal himself had practiced it