Maa Kalaratri is also spelled as Kaalaratri, and Kaalratri.
Worshipping Maa Kalaratri eliminates any sort of malefic effects of planets and obstacles from her devotee's lives.
Maa Sati or Adishakti incarnated as Goddess Parvati, she was born in the house of sage Katya, hence she was named Katyayani.
Maa Katyayani is the warrior form of Goddess Parvati. Being the most violent form of Goddess Parvati, Maa Katyayani is also the warrior Goddess.
Maa Katyayani is worshipped on the sixth day of Navratri.
According to Hindu puranas, sage Kaatyaavana ardently worshipped Goddess Durga. Impressed by him and his incessant devotion, sage Kaatyaavan was granted his wish of becoming a father to a goddess, hence Goddess Parvati too birth as Maa Katyayani at his home. She took this birth to destroy demon Mahishasura.
Maa Katyayani is depicted sitting on a ferocious lion, she is represented with 3 eyes, and 4 hands. Two of her left hands are carrying a lotus, and a sword, her other two right hands are seen in Varada, and Abhaya Mudra.
Upon worshipping Maa Katyayani, he devotees get rid from their sins.