Written and produced by Kristoffer Rygg and Tore Ylwizaker, the EP was issued on 27 September 1999 via Jester Records.

The EP showcased Ulver's new electronic musical direction that would become more readily apparent on the album Perdition City.

[1] In the sleeve notes to Metamorphosis, the group declared: Ulver is obviously not a black metal band and does not wish to be stigmatized as such.

We acknowledge the relation of part I & III of the Trilogie (Bergtatt & Nattens Madrigal) to this culture, but stress that these endeavours were written as stepping stones rather than conclusions.

John Chedsey, writing for Satan Stole My Teddybear, commented: “Having consistently reinvented themselves on every release, Ulver has made the final transformation into an electronic act in the vein of Future Sound of London or a more resonant and layered Aphex Twin.