Isengard was the solo-project started in 1989 by Fenriz - one the key driving forces behind Norwegian legends Darkthrone - because he had many musical ideas to explore that didn't strictly fit in with the style and music of Darkthrone. Under the Isengard moniker, Fenriz has a trio of releases, Vinterskugge, Høstmørke, and most recently the further collection of Fenriz's early and rare recordings, released in 2020 as Varjevndogn.

The original version of Vinterskugge consisted of 3 separate recording sessions conducted between 1989 and 1993 and covering a multitude of styles, including doom, rock, folk, death, black and viking metal. Vinterskugge also demonstrated Fenriz's breadth of vocal styles, lending an epic edge to many of the tracks.

This vinyl release contains the second and third chapters of Vinterskugge, with 1989's cult Spectres Over Gorgoroth recordings, followed by tracks made in 1991 and forming the 'Horizons' chapter.

This edition of Spectres Over Gorgoroth is presented on black vinyl and features the original demo cassette cover artwork, plus additional lyrics.