A mere mortal with no talent got an immortal body based on luck and after 5000 years of being in solitude researching and got his knowledge to an "alright" level
I say "alright" because HE cultivated for 5k years and are still useless against 20+ levels higher than him unless he uses "dynimates" aka artifacts to beat them.
I call BS on the author for making him only level 20 after 5k years.
And if he can't defeat the Black Emperor in one strike, he's trash.
I am only here for the romance but it's non-existence so far. So it's quite boring.