Finnish-born musician. In 1993, he formed the Finnish black metal band Horna. Besides Horna, Pystynen has played in several bands of different genres of metal. He founded and has played bass and guitar for Sargeist since 1999. He is also known for playing bass and guitar for Behexen from 2004-2015. Pystynen also has several solo and smaller projects which, in some, he plays all instruments and sings for.