Goddess Kaushiki or Devi Kaushiki Story is very interesting. Kaushiki Amavasya is the day when Mata Parvati appeared as Devi Kaushiki from Her dark skin. Once, Lord Shiva made fun of the dark complex of Mata Parvati's skin. Being humiliated by her own husband, Mahadeb. So angrily she left her dark skin and turned herself fair skinned. From her skin, there was born a beautiful lady who was born from the skin or kosh of Mata Parvati. Sumbha Nisumbha, two demon brothers became most powerful in the universe after getting a special boon from Brahma that no male could kill them. Only a lady born from Devi Parvati would cause their death. On the day of Kaushiki Amavasya, Devi Kaushiki appeared and killed Sumbha Nisumbha. Before their death, Devi Kaushiki killed Chanda, Munda. Mata Kaushiki became Devi Chandi after killing Chanda. The story Devi Mahamaya, Kaushiki Amavasya story in bengali is mentioned in Devimahatyam of Markandeya Puran. This part is also called Sri Sri Chandi.
