As thousands upon thousands of streams of demon phoenix essence blood poured into the nine netherworld flame, this peculiar flame from another plane finally evolved into the undying flame described in the inherited memories. Its power surpassed that of the former nine netherworld flame by more than a hundredfold!
Even Xiao Yan, who had single-handedly nurtured it, had never expected such a terrifying increase. After all, although he possessed the inherited memories left behind by the nine nether flame, he was not a true member of the Nine Nether Clan and had no idea just how powerful the undying flame would be.
Since this flame bore the name "undying," it naturally possessed qualities worthy of that name. As the name suggested, its wielder would gain an "undying" trait similar to that granted by the three thousand burning flame, only far stronger. As long as the damage did not instantly obliterate them, the undying flame could repair it.
Besides its undying trait, this flame also possessed an exceptionally domineering offensive power. It could even burn Dou Qi away completely. In that respect, it somewhat resembled the golden emperor burning heaven flame, ranked fourth on the Heavenly Flame Ranking. Xiao Yan had never seen the golden emperor burning heaven flame, but by his estimation, his undying flame should be no weaker than it, and might even be stronger.
What Xiao Yan did not know, however, was that the essence blood of those Heavenly Demon Phoenixes alone was nowhere near enough to evolve the nine netherworld flame into the undying flame. Its successful evolution also owed much to the demon sparrow bloodline within him. Moreover, the restrictions of this plane prevented the undying flame from unleashing its true power. Otherwise, its might would have been even more terrifying.
After imprisoning the entire