The blood-hair was slowly transforming into ash, and Bai Xiaochun was completely wrapped up in his cultivation. As such, he didn't even know how much time was passing. By the time he reached the seventh stratum of the Undying Bones, half a month had gone by.
There was simply too much life force within that lock of blood-hair, and as it poured into Bai Xiaochun, he continued to advance through the levels of the Undying Codex.
In fact, it seemed possible that, by the time he reached the peak of the Undying Bones, there might still be life force left over, which he could then use as fuel for his future Undying Blood!
Meanwhile, word was spreading through the lands about how the Celestial, along with an imposter Bai Xiaochun, had fought with the Hell-Emperor. The news spread like wildfire, and was the subject of discussion among soul cultivators, necromancers, and savage tribes alike.