Wang Feng's biggest asset in finding other universes was his own spark. His own soul was the only one he knew for sure to come from another universe. He was a bit reluctant to mess with his own soul.
Through a spree of bandit killings, he hoped to find out how and where their souls went. The research bore no fruit. The only thing Wang Feng could figure out was that the sparks affected every cell in the body simultaneously while having no mass and occupying no space. It was really bizarre. What's more, the effect of the sparks on the body was zero-sum, meaning that if the spark affected a certain point by one unit of measure, it affected another point by minus one unit of measure, making detection of the sparks really hard.
