The blessings of Maa Baglamukhi create a divine protecting defend in the shape of the aura about somebody therefore defending him/her from malefic energies in the shape of black magic spells or evil eye. Yet another etymology suggests that valga usually means "to paralyze" and symbolizes the power of stambhana, https://vashikaran55434.blogunteer.com/34841039/baglamukhi-no-further-a-mystery