Do you think this idea makes sense?
What fascinated Tianyu the most was the possibility of creating Soul Tools that could evolve. A concept began to take shape in his mind: what if a Soul Tool could grow along with the user's soul power level? For example, when the user's soul power reaches level 30, the Soul Tool would be at Class 4. Then, when it reaches level 50, the tool would upgrade to Class 6, and so on.
I don't know much about Soul Tools myself, so I'm asking for advice from those of you who may have read more types of Douluo novels and have a better understanding of Soul Tools than I do.