Origin story
When the asuras Chanda and Munda attacked the Goddess, she manifested from her brow as Kali and destroyed them, earning the name Chamundi. In Kerala her shrines often stand on hills and at village boundaries, where she protects the community.
The garland of skulls, the sword and the corpse-like form express the destruction of ignorance and ego. As Chamundeshwari she is also the gracious mother who grants boons, and her worship is tied to the Matrikas, the seven mother goddesses of the Shakta tradition.
Source: Wikipedia: Chamunda — https://en.wikipedia.org/wiki/Chamunda
