The blessings of Maa Baglamukhi produce a divine protecting shield in the form of an aura around someone thereby protecting him/her from malefic energies in the form of black magic spells or evil eye. A further etymology implies that valga indicates "to paralyze" and symbolizes the strength of stambhana, "paralysis" https://www.youtube.com/shorts/5VeSyP9JRw0