Complex sentence: Callimaco, masquerading as a doctor, convinces Nicia to drug Lucrezia with mandrake, claiming it will increase her fertility, but adds the dire warning that the Mandrake will undoubtedly kill the first man to have intercourse with her.
Split into simpler sentences: Callimaco, masquerading as a doctor, convinces Nicia to drug Lucrezia with mandrake, claiming it will increase her fertility. He adds the dire warning that the Mandrake will undoubtedly kill the first man to have intercourse with her.