After all, Lian Chengyu’s primitive methods of brewing the desolate bones could at best refine a small amount of the desolate bone’s essence. Just this small amount of essence was enough for Lian Chengyu to breakthrough to the Purple Blood realm.
However for Yi Yun, using the Purple Crystal to absorb the desolate bone’s energy, he could absorb it completely and with high efficiency. Also Yi Yun’s cultivation level was still low at the Thunderous realm, if the cultivation speed increased any faster, Yi Yun might even scare himself…