After Signing in with the Demon Cult for a Hundred Years, I Will Be Invincible

What does it feel like to sign into the Demon Cult, Holy Lord? Medicine Fairy? There is another Chu Xiu who traveled through time but had mediocre qualifications and could only become a cleaning disciple. But there is always a way, and he got the sign-in system. He is the Holy King, and he is the Medicine Immortal.