Complex sentence: He says that in the old days, Cronos judged men just before they died, and sent good and righteous men to the Isles of the Blessed and godless, unrighteous men to the prison of vengeance and punishment called Tartarus.
Split into simpler sentences: He says that in the old days, Cronos judged men just before they died, and divided them into two categories. He sent good and righteous men to the Isles of the Blessed, and godless, unrighteous men to the prison of vengeance and punishment called Tartarus.