Shumbh and Nishumbh were two demons who did severe penance with the intent to conquer the three worlds. Both of them practised intense sacrifice for ten thousand years to please Brahma. The Lord was satisfied with their tapasya (sacrifice) and appeared before them. He bestowed upon them the power they desired. No sooner had they acquired their boon than they began a reign of terror. With the arrogance born of the strength of the boon, both of them were invincible. None could resist them. They plundered and struck down all who were righteous. They overpowered the Devtas and snatched from them the powers they possessed.
Unable to bear the torment of Shumbh and Nishumbh, the holy ones sought the protective shelter of the Divine Mother. They praised Her, submitting themselves unconditionally at Her feet. She promised to help them but informed them that she had to wait until they had exhausted the good fortune of the boon. She left for theHimalayaswhere she waited until the moment was right.
While there, she was confronted by Chand and Munda who immediately fell in love with her beauty. They tried to seduce Her and without much effort, Maa assumed the form of Kaali Maataa and brought about their end. As such she is known as Chamunda Devi.
Not long after, a battle ensued between Devi and Shumbh and Nishumbh and she destroyed them as well. The earth was relieved of its burden. The Devtas were again happy and able to go about their daily tasks.
Devi Maa explained to them that they should heavily guard what was theirs and allow no penetration of enemy forces. Everyone showered praises to the Divine Mother for her compassion and love of her children.
