Should the planetary condition isn't excellent with your horoscope or The celebrities are usually not in your favor then this puja is most powerful. Nav Chandi yagya is the combination of 1000 mantras that are exported kind Markandeya Purana. In Markandeya Purana, you will discover various mantras for different troubles. https://www.youtube.com/watch?v=QIX0JZlLsgE