The blessings of Maa Baglamukhi produce a divine protective shield in the form of an aura around an individual thus defending him/her from malefic energies in the form of black magic spells or evil eye. Another etymology suggests that valga means "to paralyze" and symbolizes the power of stambhana, "paralysis" https://jasperhpttv.blogs100.com/36257932/everything-about-baglamukhi