Shivaduti is a powerful manifestation of Mother Goddess Shakti. Shivaduti means one who has Shiva as her messenger. Goddess Shivaduti made her appearance in the battle against demons Shumbha and Nishumbha. She symbolically represents the unfathomable power of Mother Goddess Shakti.
As per Devi Mahatmya, in the battle against the forces of Shumbha and Nishumbha, Mother Goddess took the manifestation of the Saptamatrikas. They were Shaktis of the male gods. After this appeared Shivaduti, the Shakti of Mother Goddess. This form is not associated with any male form.
Devi Mahatmya states that she appeared from the body of Mother Goddess in the most gruesome form – yelping like a hundred jackals. She then asked Lord Shiva to carry the message to Shumbha and Nishumbha that if they desire to battle against her out of arrogance and false belief in their strength, then they and their forces be ready to be devoured by her jackals.
It must be noted here that Goddess Shivaduti is a symbolic representation of what form Goddess Shakti can take to put down Adharma.