Chen Nianzhi pondered inwardly, his brows knitting slightly.
To form the power of Grand Unity Dao patterns through the union of the twin swords was exceedingly difficult.
For fused swords to produce Grand Unity Dao patterns, not only were there requirements for the materials and formation patterns of the immortal swords, but the formation patterns within the swords first had to be utterly pure and pristine.
Upon careful consideration, Chen Nianzhi's Blazing Fire Return-to-Ruins Sword had initially been refined from Thousand-Year Scarlet Iron.
Over the course of its continual advancement, it had successively absorbed seven or eight immortal metals and divine materials, including Blazing Fire Crystal, Scarlet Flame Ancient Iron, Purple Flame Heavenly Gold, and Azure Flame Immortal Metal.
Although these immortal metals and divine materials were all fire-attributed rare treasures, each possessed Dao patterns unique to itself.
As they were continuously fused into the Blazing Fire Return-to-Ruins Sword, they enhanced its power, but they also gradually made the formation patterns within it increasingly mixed and impure.
These rare treasures were all fire-attributed wonders, and the Dao patterns within them were largely alike. If they were not meant to be fused, that was one thing, but if he wished to drive the Heavenly Separation Twin Swords into union, they would become the greatest obstruction.
Yet these Dao patterns had been deeply branded into the Blazing Fire Return-to-Ruins Sword. Even the strongest immortal would find it difficult to erase them completely.
If he forcibly ground them away, the Blazing Fire Return-to-Ruins Sword would be destroyed on the spot. The Heavenly River Ren-Water Sword was no different.
"Deducing the Dao patterns for the swords' union is a minor matter. Whether I can cleanse the Heavenly Separation Twin Swords is the real trouble."
Chen Nianzhi murmured, unable to keep from frowning slightly.
But