Returning to the Human-Devil Saint City

The method Duan Ling Tian had come up with was really simple. When he returned, he would look for an opportunity to improve Ke'er's Innate Spiritual Root. Currently, she possessed a dark violet Innate Spiritual Root which was also considered as the best Innate Spiritual Root. If there was an improvement to her Innate Spiritual Root, it meant that dark violet Innate Spiritual Roots were not the limit and could be further improved!

'I can't wait to return and test my theory on Ke'er. I have to see for myself if dark violet Innate Spiritual Roots are really the best Innate Spiritual Root!' Duan Ling Tian could not wait to return to the Human-Devil Saint City when he thought about it. However, he did not return immediately. He took a sharp turn and headed to another direction when he was near the Human-Devil Saint City.