On the ninth day of Navratri, there is a law to worship the Siddhidatri form of Maa Durga. Maa Siddhidatri is the giver of Ashta Siddhi and Nav-Nidhi. Maa Siddhidatri destroys the vices and faults of her devotees and leads them on the right path. By worshipping Maa Siddhidatri with full devotion, a person gets all the Siddhis. Humans, Yakshas, Gandharvas, Siddhas, Gods, Demons, etc. all worship Maa Siddhidatri.