The blessings of Maa Baglamukhi develop a divine protecting shield in the shape of an aura all around someone therefore shielding him/her from malefic energies in the form of black magic spells or evil eye. Another etymology implies that valga indicates "to paralyze" and symbolizes the strength of stambhana, "paralysis" https://arthureortz.buyoutblog.com/35663588/the-basic-principles-of-baglamukhi