The Jiuqu Yellow River Formation Has Been Broken, Why Don't You Transform?

My name is Qin Xuan. Accidentally traveled to the prehistoric era and turned into an innate black cloud! Not only is it top-notch, it also activates the breakthrough system. Breaking through the realm is as easy as drinking water. But I didn't expect that I couldn't sense the catastrophe of transformation. ………… I am Yunxiao, one of the eight direct disciples of Jiejiao. I was killed by Yuanshi Tianzun and became a puppet of the heaven. But I was reincarnated back to when I first joined Jie Jiao, and knowing the tragic end of Jie Jiao in the Conferred God Tribulation, I vowed to turn the tide and save Jie Jiao from the fire. Originally I thought I had accepted a talented Hei Yun as my disciple. As a result, this guy not only had no interest in practicing, but also refused to transform. But the key point is, why is he so lazy, but his cultivation level is still improving at an unimaginably fast rate, and he has surpassed me unknowingly, reaching the point where I can't sense it! Also, the Jiuqu Yellow River Formation was broken, and you still haven't transformed? ………… This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.