Kaalabhairava Ashtakam is a good looking Sanskrit hymn, composed by Adi Shankara. It comprises 8 stanzas; which happen to be usual of any Ashtakam. The hymn depicts the features of Kaala Bhairava of Kashi, the God of Loss of life. This Bhairava is described as currently being black; with https://www.youtube.com/watch?v=S2iLMNuDYc0