Kali will be the goddess of Dying, time, and destruction. She has an exceptionally darkish complexion and wears a garland on the skull around her neck. Her tongue protrudes away from her mouth and is also purple. She killed the demon Raktabija. Mahavidya also initiate tantrik mantra on this https://www.youtube.com/watch?v=GMMWwN9ho2U&t=6s