The fundamental reason was that he had encountered far too little of the hundred arts of immortal cultivation at the immortal rank.
One must not underestimate the hundred arts of cultivation. Chen Nianzhi's Heavenly Separation Twin Swords had already advanced to the immortal rank and remained lower-grade immortal treasures for two thousand years, yet they had never been able to advance any further.
The root cause was that Chen Nianzhi's attainments in formations and artifact refinement were still insufficient. He could not deduce the two immortal swords to the realm of middle-grade immortal swords.
If Chen Nianzhi's mastery of the hundred arts of cultivation were sufficient to elevate the Heavenly Separation Twin Swords into middle-grade immortal treasures, then the power of his twin swords united as one would surely increase enormously.
Chen Nianzhi estimated that if he reached that point, then when driven by his Primordial Unity Limitless Law, the might of the Heavenly Separation Twin Swords united as one might approach the level of the ninth level of Ascension.
"Once I succeed in advancing them, perhaps even ordinary late-stage Ascension cultivators will no longer be my match."
Chen Nianzhi pondered briefly and made up his mind. This time, he had to purchase at least one inheritance of formations and artifact refinement, so that he could raise the Heavenly Separation Twin Swords to middle-grade immortal rank as soon as possible.
Only then would he be confident of suppressing the Redflame Divine Vulture Emperor and protecting the safety of those around him.
"We're here!"
The two had flown for who knew how long. Before they realized it, they had crossed the Setting Sun Sea Region and arrived at an overseas immortal island.
It was an incomparably vast ancient continent. Desolate wilderness stretched across the land to the ends of heaven and