One more tale information that a demon named Madan acquired Vak-siddhi, by which whatever he reported came correct. He misused it to difficulty people and murder people. A different etymology implies that valga means "to paralyze" and symbolizes the strength of stambhana, "paralysis" which the goddess is said to grant; this concept appears https://www.youtube.com/shorts/5VeSyP9JRw0