Kaalabhairava Ashtakam is a gorgeous Sanskrit hymn, composed by Adi Shankara. It comprises 8 stanzas; which are standard of any Ashtakam. The hymn depicts the traits of Kaala Bhairava of Kashi, the God of Dying. This Bhairava is described as currently being black; without clothes; horrible-wanting with protruding fangs; https://www.youtube.com/watch?v=S2iLMNuDYc0