Sharada Navratri, the last of the four navaratis that celebrates the change in seasons in India, is associated with the nine forms of Shakti. One the 10th day (Vijayadashami), Goddess Durga is said to have killed demon Mahishasura (hence, she is named Mahishasuramardini) celebrating the victory of good over evil. Another version has lord Rama killing Ravana, angain…