Devi Siddhidatri: In the beginning of the universe, Lord Rudra worshipped the unmanifest form of the Mother Goddess, AdiParashakti for creation. As Adi Parashakti, the Mother Goddess was pure energy and had no form. She thus appeared in the form of Siddhidatri from the left half of Shiva.
Day of worship: 9th day of Navratri
Governing planet: Ketu
Mantra: Om Devi SiddhidatryaiNamah ॐदेवीसिद्धिदात्र्यैनम
Iconography: Goddess Siddhidatri sits on Kamal and rides on the lion. She is depicted with four hands. She has Gada in the one right hand, Chakra in the other right hand, lotus flower in the left hand and Shankh in the other left hand.
Specific power: She bestows all types of siddhi(supernatural powers) to her devotees and hence is worshipped by humans, ,ghandarvas, asuras and devas alike.
My previous posts can be visited on the following link :