The Blessings of Maa Baglamukhi produce a divine protective shield in the form of the aura all-around someone thus protecting him/her from malefic energies in the shape of black magic spells or evil eye. Another etymology indicates that valga indicates "to paralyze" and symbolizes the strength of stambhana, "paralysis" the https://www.youtube.com/shorts/5VeSyP9JRw0