Isengard is a solo project of Fenriz, famous for being the drummer of Darkthrone, created in 1989.
It is rooted on Norwegian black/Viking metal and avant-garde rock on some tracks, and named after the Tolkienian locale Isengard.
The person/creature in Isengard's logo was taken from an old Lord of the Rings RPG called MERP (Middle Earth Roleplaying). The original illustration represents Thuringwethil, the vampire from Tolkien's book The Silmarillion.
Fenriz created Isengard because he had many musical ideas that didn't fit in with the style and music of Darkthrone.
Fenriz performed all instruments and vocals himself.
Vinterskugge is a compilation of three demos recorded before Høstmørke full length album was recorded.
When asked how he felt about Isengard in a November 2007 interview, Fenriz commented that he doesn't "understand why people like it so much". He stated that people like "the elements" which he doesn't like, namely the project's folk metal aspect.