Steffen Kummerer (born June 1, 1985) is a German guitarist, multi-instrumentalist and producer. Steffen is leader, main songwriter, vocalist, and guitarist of the death metal band Obscura as well as the black metal band Thulcandra in which he is the only remaining founding member. Since 2012 he has been a touring member of the band Death. Kummerer's Ran custom guitar shape have become a signature shape unique to him and his band Obscura.