After collecting the Eighth Level Soul Technique Sharp Pupil, Chu Mu specifically went to the area for Seventh Level Soul Techniques and chose a book on seventh-level defense skills.
In all lines, the Rock type defense was the most absolute, so Chu Mu chose Dark Crystal Rock Armor as his seventh-level soul technique.
Ghost Dome King actually also possessed Dark Crystal Rock Armor, which was considered a racial skill for Ghost Dome King. However, this racial skill could not be applied to others, and if Chu Mu used Charming Pet's copy, the power would be greatly reduced.
Chu Mu was currently a Five-Thought Soul Master, and by using the seventh-level defense soul technique in a pure way, he could resist ninth-rank attacks to a certain extent.
