This is one of the boons for which Bagalamukhi's devotees worship her. Other Mahavidya goddesses can also be claimed to symbolize equivalent powers handy for defeating enemies, being invoked by their worshippers by many rituals. An additional etymology suggests that valga means "to paralyze" and symbolizes the strength of stambhana, https://mantra60482.blogchaat.com/36510238/the-single-best-strategy-to-use-for-beej-mantra