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