Navchandi yagna is actually a Nav Durga puja. This puja is to produce wishes come true and also for health, prosperity, energy. Also the prosperity, accomplishment and many other complications in the existence. कि यह रुद्रमाला तंत्र से है। इसी मूल मंत्र के लिए, रुद्रयामल खुद नवरत्न कथा के तहत https://www.youtube.com/watch?v=QIX0JZlLsgE