Yantra can be a diagrammatic representation of mantra. Yantra is definitely an abode of the specific ruling deity or archetype. It's an interlocking matrix of geometric figures, circles, triangles and floral styles. This aspect gets expressed with the Vibration and Resonance concerning the Shakti Mantra in the Yakshini. This https://www.youtube.com/watch?v=uTDAtp7YWmE