In the ancient times, a demon king called Mahishasura earned the favour of Lord Shiva after a long meditation. Pleased with the devotion of the demon king, Shiva blessed him with a boon that no man or God would be able to kill him. Empowered with the boon, Mahishasura started his reign of terror everywhere. People were killed mercilessly and even the Gods were driven out from heaven. The Gods went to Shiva for relief and informed him about the atrocities caused by the demon king. Shiva, became very angry. Shiva’s  anger came out in the form of an energy from his third eye and concentrated to form a woman. All the Gods who were present there, contributed their share of energy to this woman and thus Goddess Durga, the eternal mother, was born. Riding a lion, she attacked Mahishasura. After a fierce battle, Durga transformed into Devi Chandika, the most ferocious form of the Goddess Durga, and beheaded Mahishasura bringing back heavenly peace everywhere.  Durga is the image of power and vigour, since ages worshipping her, has become a tradition in India.