Asura brothers. The elder one was Chanda and the younger Munda. Like Dhumraksha, Raktavarna and many others, they had their own armies. During that time, the brothers Shumbha and Nishumbha prayed to Brahma in the Himalayas. Brahma appeared and blessed that they could be killed only by a woman. They came back and from then, Chandamundas became their allies. Shumbha and Nishumbha began a victory march through earth, heavens and patala. The devas fled and as per Brihaspati’s advice asked Parvati for help. She agreed to help and sat alone on a rock. Chandamundas arrived there then and were awestruck by her beauty. They informed Shumbha and Nishumbha who sent Dhumraksha and 60000 soldiers to capture her. Parvati turned Dhumraksha into ash. Then came Chandamundas and Kali fought fiercely with them, finally beheading them. From then she became known as Chamundi. FInally parvati also killed Shumbha and Nishumbha as per Devibhagavata Panchamaskanda.