Compared to the little mink who had only been cultivating for a few months, the three butterflies had a much higher level of cultivation. At least the spiritual energy surrounding them was far more intense than what Xi Xizhi had.
However, they all cultivated without guidance, relying on their absorption of the Energy of The Heavens and Earth to improve their cultivation. This process was extremely slow, and with no one instructing them, they knew very little about many aspects of cultivation.
This was also the reason why many demons cultivated for a hundred years without achieving enlightenment.
Xi Xizhi demonstrated the method by guiding the butterflies to mobilize their spiritual power within their bodies and urged them to transform into humans. No matter how hard Xi Xizhi tried, she couldn't transform herself. After such a long time, she had somewhat figured out the knack for it. It seemed that when every animal first began to transform, they were in a very unstable state.