seems like the author took Great inspiration from emperors domination, "immortal crow", nine heavenly treasures and scriptures, epoch giants and few more familiar stuffs I see.
Ch 56 Immortal Secret
Reincarnated As The Strongest Ancestor With a System
hmm imo the system is making it too easy for him to gain disciples, it 2ud be better of we saw him put some effort into finding and taking in disciples
Ch 7 Princess of the Great Zhou
I Am Such An Expert; Why Do I Have To Take In Disciples