Bai Xiashuang made her breakthrough smoothly and she went to Lu Li for her gift at once.
Since Lu Li had killed many in the small battlefield and had secured quite a number of Interspatial Rings, he had one extra Holy Grade Xuan Artifact which was given to Bai Xiashuang. He also let her go out and have fun for half a month.
Lu Li himself didn't achieve a lot during the month except with his Xuan Energy. He didn't progress well on the front of Soul Shattering and had only mastered some techniques of soul vibration waves.
Now that he could form vibration waves of physical strength, it was easy to mimic that into soul vibration waves. Essentially, it was the same thing but with different types of energy. Vibration waves could also be formed using soul energy.
Lu Li didn't use people in trials. He could shatter other's souls if he was not careful. Xuan Beasts had no souls so they could not be experimented on, either. He would have to go out and find some condemned prisoners.