Refining a Level Four High-grade Weapon was far more complicated than refining Level Four low-grade weapons. The refining materials alone numbered more than twenty.
Su Mo put in over a dozen of the main materials and continuously smelted them. Since Su Mo had entered the True Profound Realm, the true fire transformed from his profound energy was more powerful, and he smelted the materials extremely quickly.
In less than a quarter of an hour, all the materials had melted into liquid.
Next came the removal of impurities within them. Fortunately, Su Mo's Spiritual Power was exceedingly strong; under its sweep, the impurities in the furnace had nowhere to hide.
After spending nearly another quarter of an hour, all impurities had been removed, and every material had become an incomparably pure solution.
Then, Su Mo placed three more materials into the furnace.
Of these three materials, two increased the weapon's toughness, while one increased its stability.
Ou Lianzi's Artifact Refining Inheritance described all kinds of Artifact Refining methods in great detail. It explained clearly how much of each material was needed for each weapon, when it should be added, and what purpose it served.
Thus, Su Mo only needed to follow the method and refine it step by step.
After a short while, once the three materials had completely melted and perfectly fused with the other Artifact Refining solutions, Su Mo stopped pouring profound energy into the fire inlet.
Then, he used his powerful Spiritual Power to control the solution and shape it.
The solution slowly stretched out before forming a long saber two and a half feet in length.
"I over-refined it a little!"
Su Mo frowned slightly. Based on the amount of materials he had used, the saber should have been three feet long, yet it was now only