Ye Yuan's current soul force could no longer be compared to the past. It could already sustain the Sword Driving Technique for some time.
It was just that the requirement the Sword Driving Technique had towards soul force was too high. He could not keep it up for too long either.
Furthermore, while the Sword Driving Technique was strong, when facing a half-step Crystal Formation Realm expert like Tian Yu, it was still unable to gain any advantages.
After over a dozen rounds, Ye Yuan withdrew his soul force and brought the Canghua Sword back.
This time, Tian Yu did not seize the opportunity to pursue. He understood that the same method was already useless towards Ye Yuan!
Tian Yu looked at Ye Yuan with eyes like burning torches, appearing very excited.
It was apparent that the battle earlier was to his heart's content.