While the three outside observed the Dao through the barrier of fire, Chen Yang, within the Secret Realm, was also watching Yan Ming's entire spellcasting process from up close.
The reason Yan Ming could construct a spatial barrier that even a Great Venerable could not break lay in the Dao Integration power that Chen Yang had once assumed belonged to Zhen Xuan.
Through this meticulous observation and sensing, Chen Yang came to understand why he, Liuli, and the others had never been able to truly fuse the two powers perfectly.
At its root, they had lacked one crucial ingredient: true fire!
Whether it was the Spirit Tempering Divine Technique mastered by Liuli or the Blood Refining Divine Technique mastered by the Blood Sun Venerable God, both could achieve some results when it came to merging the power of two paths, but they were still far from perfect fusion.
To use a simple and easily understood example, true essence and divine power were like two metal ores of utterly different materials.
The methods Chen Yang and the others had used in the past were like welding or compression, making the two connect or combining them in certain parts.
Such methods might have some practical use, but to truly merge the two ores into one, those measures alone were still nowhere near enough.
Born from the Heavenly Fire Secret Realm, Yan Ming himself had been formed from the convergence of the many great fortunes and phenomena accumulated by the Xi Yan Immortal Mansion since ancient times. The true fire power nurtured within him was, in terms of quality, among the very best even across the whole of the Canglan Continent.
It was precisely because he possessed this uniquely endowed true fire power that he could completely smelt together the two ores representing