Just like when Zhang Chen previously spied on the Fox Spirit cooking next door; at that time, the Fox Spirit revealed its form, intentionally allowing him to see it. Later, when the Fox Spirit transported items through the wall, it intentionally concealed its soul form to tease him.
After analyzing the Fox Spirit, Zhang Chen began analyzing his three skills. After much analysis, he was still puzzled. Among his skills, only the first one could suppress the Fox Spirit's soul. The second skill could control unranked beasts, and the third skill could only control his own blood. It seemed there was indeed no good way to deal with the Fox Spirit.
"Moreover, what I see of the Fox Spirit doesn't represent all of its skills. This Fox Spirit must have hidden skills. I wonder if my first skill, upon reaching the third tier, can compete with the Fox Spirit," Zhang Chen thought to himself.