Yin Jiuyou set up a trap, proclaimed himself the Demon Yuan, returned to his childhood, and approached his old enemy Lin Yu as a disciple. Disintegrating the Immortal World from within and destroying Taixu Immortal Lord from the highest place - this should have been a perfect plan.
The only variable is that Lin Yu treats him really well.
But if you stay in darkness for a long time, you will become greedy for light.
Intention: Pretense will eventually be broken down by sincerity