Only she was able to kill Raktabija the demon against whom the Gods had signed the final showdown.
But Raktabija - as his name (in Sanskrit 'rakta' means 'blood' and ‘bija’ ‘seed’) - seemed invincible as soon as a drop of his blood touched the ground another demon arose, and so ad infinitum.
Then from the eyebrow of Durga, Kali was born, the night supreme devouring all that exists, the time destroing the worlds, the one who inspires fear, in fact the one who embodies all the fears you, but who ignores the fear.
With his mouth she drank the blood Raktabija avoiding touching the ground and then she cut cleanly through the head of the demon, just the head in her left hand.
But the thirst for blood, violence, death has now made drunk the goddess, she cannot stop herself, she no longer distinguishes the enemies from friends, the good from the bad, and all kills, destroys everything. Only Shiva, her husband, can stop her jumping on her. Kali wants to kill Shiva too, but when she recognizes her husband, she stops. He is on the ground, seems helpless and defenseless, the foot of the goddess is on his chest. Even Shiva, without his own shakti, his energy is inert.
Prearyan divinity, probably dravidian, Kali is worshiped by reciting the mantra Krim and sacrificing live animals.
A big festival in honor of Kali is held in the month of Ashvin (late September), it is Navaratri, the nine nights that remind the nine days of the year in which Shiva allows his wife to travel from his mother.
Kali is regarded as a terrible aspect of the goddess Parvati, but also as an independent deity having a benevolent aspect and terrible in keeping with the ambivalence of deity, which manifests itself, according to Hindu tradition, in continuous cycle of life and death, creation and destruction.