The higher the grade of a Divine Weapon, the more difficult it is to refine. Especially at the Heavenly Divine Weapon Level, the difficulty becomes even more terrifying. This is because once at the Heavenly Divine Weapon Level, they possess high spiritual consciousness and will choose their own masters.
Just like the Demon Slaying Sword Chu Feng obtained, despite so many people fighting for it, it ended up recognizing someone as lowly as Chu Feng, who neither had a significant cultivation nor any sword meridians, as its master.
This was because the Demon Eye Evil Spirit King had subdued the Sword Spirit within the Demon Slaying Sword.
Forcing it to acknowledge Chu Feng as its master.
Chu Feng's Nine Veins moved together, and streaks of Red Sword Energy, resembling Jiao Dragons, coiled around the two Divine Weapons, ceaselessly refining them.