The Blessings of Maa Baglamukhi develop a divine protecting defend in the form of an aura all-around a person thus defending him/her from malefic energies in the shape of black magic spells or evil eye. A further etymology implies that valga suggests "to paralyze" and symbolizes the power of stambhana, https://www.youtube.com/shorts/5VeSyP9JRw0