Shi Feiyang originally intended to restrict Ji Fan's Lifebound Divine Demon, forcing it to swear allegiance to him in order to control it. He also wanted to use a Divine Demon he refined himself to replace Ji Fan's Guardian Divine Demon to monitor him for a long term but discovered that the West Pole Sect's approach of integrating three into one was indeed somewhat formidable.
Every time someone took a master, the master would sever a part of their Guardian Divine Demon to give to the disciple, becoming the disciple's own Guardian Divine Demon.
And the master's Guardian Divine Demon itself hailed from his own master, eventually tracing back to the origin, the Creator God.
As they cultivated, they swore allegiance to the Creator God, forming a mysterious connection; when their Lifebound Divine Demons were fully cultivated, their final destination after death would naturally be to the paradise where the Creator God resided.