Complex sentence: Vishnu had cut her body into 52 body parts using his Sudarshana Chakra which fell on Earth to become holy spots to pray to the Goddess named Shakti Peeths, to complete this massively long task, Lord Shiva took the form of Bhairav.
Split into simpler sentences: Vishnu had cut her body into 52 body parts, using his Sudarshana Chakra, which fell on Earth to become holy spots in which to pray to the Goddess named Shakti Peeths. To complete this massively long task, Lord Shiva took the form of Bhairav.