Lv Zhong's Eye of Heaven's Dao was formed by accident.
At that time, Lv Zhong was operating the Yin Yang Harmony Path cultivation method, invoking the Seizing Heavenly Power and the Seizing Earth Spirit, and using stealth to make up for his own deficiencies. Unintentionally, the Karma Power and Merit Golden Light within his body, two completely opposite mystical energies, bizarrely annihilated and neutralized each other, creating a new kind of energy.
In fact, whether it is Karma Power or Merit Golden Light, both are products of the Heavenly Dao and two different manifestations of Heavenly Dao energy.
If you commit evil acts, the impartial Heavenly Dao will bestow Karma to punish you; if you do good deeds and contribute to heaven and earth, it will reward you with Merit to aid your cultivation.
But whether it's Karma or Merit, their functions of rewarding the good and punishing the wicked are the willpower of the Heavenly Dao!