The inheritance Lingxian had obtained back then came from the Mythological Era and was connected to the Kunlun of old. The secret method she now employed was a forbidden art within that inheritance, named "Return to the Source."
The idea behind this method had actually come from the Dark Turmoil. It shared the same ingenuity as the Supremes' bloody consumption of all living beings' origins to prolong their own life essence. Unfortunately, after the Ancient Venerables of the Kunlun Remnant Clan created this art, they discovered its enormous drawbacks.
Devouring origins could greatly increase the caster's strength in a short time, but it brought endless trouble afterward. As the most fundamental power of living beings, life origin was inherently highly contaminating. Even Extreme Dao Supremes found this contamination extremely difficult to escape, let alone those below the Extreme Dao.
After the Venerables of Kunlun created the Return to the Source Method, they remained unable to resolve its drawbacks. In the end, the method was shelved and classified as a forbidden art, not to be used lightly. Only after Kunlun's destruction did it spread alongside part of Kunlun's inheritance and fall into Lingxian's hands.
Now that Lingxian had used the Return to the Source Method, her origin, bloodline, and Five Great Secret Realms had all been thoroughly tainted. This was the fundamental reason her aura was so impure despite her breakthrough to the ninth heaven.
Simply put, given enough time, Lingxian herself would be unable to hold on. Her flesh and Dao Fruit would collapse completely, and in the end, her soul would scatter and her entire being would turn to ash.
Lingxian knew this herself, but she was certain that this time was enough for her to drag Qingyue down into the grave with her. Then her ruthless measures would