After Duanmu Xingling left, Zhang Ruochen pulled himself together. He did not want to think about her identity anymore. He took out the Time and Space Spinel and entered the internal space, continuing to practice Thirteen Swords Techniques of Soul Chasing.
The first three sword moves, Haunting Septuple Kill, Soul-breaking Windwhisper and Soul-repose Shadowing, had been practiced into the Perfection of Martial Arts.
Next, he needed to practice the rest of the 10 sword techniques.
Zhang Ruochen held the Violet Thunder Sword in his hands. The Heart of the Sword in the Qi Sea started to spin and turned into a small human shadow.
While the human shadow applied the sword technique, Zhang Ruochen also entered the realm of Heart Integrated into Sword. The sword in his hand waved along as well.
Zhang Ruochen took four days to practice all the sword techniques into the Perfection of Martial Arts.