Vintersorg is a Swedish progressive folk/avant-garde metal band formed in 1994 in Skellefteå, Sweden under the name Vargatron (Wolfthrone in English), but was later changed to Vintersorg. The sound of Vintersorg has vastly changed over the years, as his demo and first three albums, Hedniskhjärtad, Till Fjälls and Ödemarkens Son being folk/viking metal with black metal influence where their more recent albums, Cosmic Genesis, Visions from The