The Matsya Purana tells a unique Tale of Chamunda's origins. She with other matrikas was designed by Shiva that will help him get rid of the demon Andhakasura, who has an ability - like Raktabīja - to produce from his dripping blood. Chamunda with the opposite matrikas drinks the blood https://hubwebsites.com/story2278200/everything-about-navaran-mantra