Umskiptar (Old Norse for Metamorphosis) is the ninth studio album by Norwegian band Burzum, released on 21 May 2012 through Byelobog Productions. It has been described by Varg Vikernes as a "return to the roots", with a priority on atmosphere. The album's lyrics are taken from an Old Norse poem entitled Völuspá. The album was leaked two months before its release date, due, according to Vikernes, to a former PR agent of his having "sent promotional copies of the entire album to left wing extremist magazines" without his knowledge or consent.