Divine Mother Maha Kali killed the demon raktabija, whose each drop of blood produced another demon. raktabija symbolises chronic desires in human beings; with his drops of blood symbolising incessant desire.
Divine Mother Maha Kali Devoured all the drops of his blood and thereafter Killed the demon raktabija. The Divine Mother Is depicted With Her Tongue symbolising The Divine Mother Can Make Whom The Divine Mother Wills free from chronic incessant desires.