No one knew that the true foundation of Ling Chuxi's cultivation technique was the thundercloud heart technique. Although she had just cultivated her lightning spirit root, when she used the thundercloud heart technique to activate it, it was no different from activating the five elements of Qi.
Strictly speaking, this was not a spell at all, but a martial technique. It was just that Ling Chuxi had more or less added some key points of a spell, which was why it was called a spell. However, the essence was still a martial technique. However, just by looking at the sword light that could move the nine Heavens at will, not many people could tell whether it was a magic technique or a martial technique.
