Chapter Sixty-Four: Imprisonment_3

However, this is a symptom of the integration of immortals and demons. As long as an expert from the Longevity Secret Realm refines this magic tool, it instantly becomes pure Yang, greatly increasing its power and upgrading it to a Dao tool, making it incredibly powerful.

This process in artifact forging is called "tempering".

Of course, to "temper" a demon's treasure like the Five Prisons King Cauldron, one would need to consume a lot of Nine Yang Sacred Water. Each drop of Nine Yang Sacred Water, a rare treasure refined by experts from the Longevity Secret Realm, is extraordinarily precious. Even a True Disciple of Taiyi Sect like Yao Dian who has cultivated to the Yin-Yang realm can only possess one gourd of "Six-Yang Sacred Water" to assist in his cultivation; getting his hands on Nine Yang Sacred Water would be a pipe dream.