The blessings of Maa Baglamukhi develop a divine protecting protect in the form of the aura all-around a person thus preserving him/her from malefic energies in the shape of black magic spells or evil eye. A further etymology suggests that valga indicates "to paralyze" and symbolizes the power of stambhana, https://landenvrnhb.blogzet.com/helping-the-others-realize-the-advantages-of-baglamukhi-50501044