According to the Puranas, the city of Ujjain was called Avantika and was famous for its beauty and its devotional epicenter. It was also one of the primary cities where students went to study holy scriptures. According to legend, there was a ruler of Ujjain called Chandrasen, who was a pious devotee of Lord Shiva and worshipped him all the time. One day, a farmer's boy named Shrikhar was walking on the grounds of the palace and heard the King chant the Lord's name and rushed to the temple to start praying with him. However, the guards removed him by force and sent him to the outskirts of the city near the river Kshipra. Rivals of Ujjain, primarily King Ripudaman and Kind Singhaditya of the neighboring kingdoms decided to attack the Kingdom and take over its treasures around this time. Hearing this, Shrikhar started to pray and the news spread to a priest named Vridhi. He was shocked to hear this and upon the urgent pleas of his sons, he started to pray to Lord Shiva inside the river Kshipra. The Kings chose to attack and were successful; with the help of the powerful demon Dushan, who was blessed by Lord Brahma to be invisible, they plundered the city and attacked all the devotees of Lord Shiva.