The word Kali appears as early as the Atharva Veda, the first use of it as a proper name is in the Kathaka Grhya Sutra

The word Kali appears as early as the Atharva Veda, the first use of it as a proper name is in the Kathaka Grhya Sutra. Kali appears in the Mundaka Upanishad not explicitly as a goddess, but as the black tongue of the seven flickering tongues of Agni, the Hindu god of fire. Kali is often regarded as the Shakti of Shiva, and is closely associated with him in Puranas.

Her most well known appearance on the battlefield is in the sixth century Devi Mahatmyam. The deity of the first chapter of Devi Mahatmyam is Mahakali, who appears from the body of sleeping Shri Vishnu as goddess Yoga Nidra to wake him up in order to protect Bramha and the World from two demons Madhu and Kaitabha. When Shri Vishnu woke up he started a war against the two demons. After a long battle with lord Vishnu when the two demons were undefeated Mahakali took the form of Mahamaya to enchant the two asuras. When Madhu and Kaitabha were enchanted by Mahakali, Vishnu killed them. In the later chapters the story of two demons can be found who were destroyed by Kali. Chanda and Munda attack the goddess Durga. Durga responds with such anger that her face turns dark and Kali appears out of her forehead. Kali's appearance is black, gaunt with sunken eyes, and wearing a tiger skin and a garland of human heads. She immediately defeats the two demons. Later in the same battle, the demon Raktabija is undefeated because of his ability to reproduce himself from every drop of his blood that reaches the ground. Countless Raktabija clones appear on the battlefield. Kali eventually defeats him by sucking his blood before it can reach the ground, and eating the numerous clones. Kinsley writes that Kali represents "Durga's personified wrath, her embodied fury."

Other origin stories involve Parvati and Shiva. Parvati is typically portrayed as a benign and friendly goddess. The Linga Purana describes Shiva asking Parvati to defeat the demon Daruka, who received a boon that would only allow a female to kill him. Parvati merges with Shiva's body, reappearing as Kali to defeat Daruka and his armies. Her bloodlust gets out of control, only calming when Shiva intervenes. The Vamana Purana has a different version of Kali's relationship with Parvati. When Shiva addresses Parvati as Kali, "the black one," she is greatly offended. Parvati performs austerities to lose her dark complexion and becomes Gauri, the golden one. Her dark sheath becomes Kausiki, who while enraged, creates Kali. 👅💀👁💀👅

Jai Shiva Shakti ~ Jai Maa Kali 💀👅💀
Shubh Ratri  🕉✨🕉