Complex sentence: His descendants, according to the Vayu Purana, ruled Magadha for 1000 years followed by the Pradyota dynasty, which ruled for 138 years from 799--684 BCE.
Split into simpler sentences: His descendants, according to the Vayu Purana, ruled Magadha for 1000 years followed by the Pradyota dynasty, which ruled for 138 years. According to the Vayu Purana, Pradyotas ruled Magadha for 138 years from 799--684 BCE.