The skill left to Fang Zhou by the Demon Suppression Saint was a Yin Yang Eight Trigrams diagram, called the Yin Yang Treasure Book.
Quite a tacky name, this kind of naming ability is on par with Ling Xiaoyue.
To be honest, Fang Zhou didn't have high hopes for this Yin Yang Treasure Book at first, because he already had too many techniques on him.
Ling Xiaoyue's self-created technique, she's an Immortal, so this skill definitely leads to Ascension.
The Heaven and Earth Qiankun Technique from the Kunlun Ruins Hidden Sect, and the Heavenly Demon Blood Refining Technique obtained from the Chu Kingdom, each offers a one-stop service from Qi Refinement to Ascension.
Such techniques are not commonly found, but Fang Zhou possesses three.
Now, he has added the Yin Yang Treasure Book, and though the Demon Suppression Saint failed to Ascend, that was due to an illusion. With his talent and aptitude, if no accident had happened, Ascension would have been no problem.