Compared to ten years ago, the strength of this group of Demon Slayers he had left behind had made a qualitative leap.
Back when they were still in the Land of the Nine Netherworld, the Demon Slayers could only barely maintain a living; trying to improve their strength was still a huge problem.
This had a great deal to do with the environment the Demon Slayers lived in.
Ten years ago, before Lin Yi even knew of their existence, the Demon Slayers were living beneath the Nine Nether River.
The Nine Nether River contained a Yin Cold Power that was anything but ordinary; it was a terrifying power that even an Upper-Rank God would find hard to withstand. For the Demon Slayer Race to continue reproducing, they didn't even ask for their strength to grow.
In the All Gods Camp, there were all kinds of mighty beings; Upper-Rank Gods proficient in all sorts of Skills were as numerous as cattle.
