The hourglass repeated its cycle thrice.
Thirty-six hours had passed, which meant Xie Jiuniang had been here for three days.
It was the tenth day since she entered the secret realm.
Xie Jiuniang had mostly grasped the first move of "Heaven-Slaying", at least the meditation mantra and the method of channeling spiritual power, which she had thoroughly researched.
The only thing missing was practice.
From this, she discerned the unique aspects of the Heaven Cleaving Sword Technique.
When the sword was drawn, the body would circulate a unique meditation mantra, forming a "source" within, similar to a fuse, drawing the external world's spiritual energy to be used at will, thus unleashing a powerful force that ordinary sword techniques did not possess.
The strength of the human body was limited, while the spiritual energy between heaven and earth was boundless. As long as you had the ability, it could be harnessed, which was the core of the Heaven Cleaving Sword Technique.