Bhairav is a fierce form of Shiva, He is hooked up to the Southern face. He pertains to the Mahavidya goddess named Bhairavi who gives Lagna shuddhi (purification of the Ascendant). Lord Bhairava Shaligrama Shila purifies and protects the frame of the worshiper. This Shaligram improves the devotees self-assurance and character.
