Formerly named Chao, and under that name the three track cassette Spiritus Sankti was released in 2012 by Norwegian label Terratur Possessions, Sinmara is a Black Metal band from Reykjavík and Mosfellsbær featuring members of Svartidauði, Wormlust, Rebirth Of Nefast and Slidhr.

Musically Sinmara contrast chaotic agression with haunting melodies and dramatic build-ups, with a focus on musicianship and attention to detail.