Horns, tails, wings … Every part that made them 'demons' to the eyes of others, was quickly disappearing from the bodies of these demon lords along with the ability to produce demonic power, and the innate abilities that they possessed. There was no need to say, that the proces was not a quiet and peaceful one.
Tens of thousands of years spent as rulers of demonic legions, factios, and even families. Spent considering humans their strongest and most hated enemies.. All gone to waste. Their demonic bodies were de-evolving into those of their forefathers, and their cultivation stages were pushued back down to a point where spirit and body were not merged.. The peak of the ninth rank of spiritual cultivation, and the peak of the ninth rank of martial cultivation.
However, the dark essence emanated by the stone was not stopping at that.