Metastasen marks a continuation of Sielwolf's guitar industrial terror tactics, laid out in previous releases Magnum Force and Nachtstrom. The first of Sielwolf's albums to be re-released by Van Richter for the US domestic market, Metastasen sees already powerful guitar chords styles blended with avalanche drums and electronic or sampled elements.
From the visceral power of the opening track, "Beweglich Animalisch," it is obvious that Sielwolf have refined their form. While the usual elements are all there, Sielwolf seem to have found a new construction of sharp chords and aggressive drums that drive the track with unprecedented force. Unsatisfied with one mood, Sielwolf turn to the moodier guitar atmospheres ("Spuck Den Dreck Aus"), and darker electronic ambiences (such as the "Antimon #1" and "Antimon #2") without skipping a beat. Sielwolf either build a disquiet and tension throughout the track, or else start with energy and sustain it without doubt. Whichever the mode, the edges are always dark and sharp. Metastasen, like previous releases, is not simple industro-rock but is attempting something more complex in design.
Sielwolf seem to have made a good attempt to capture the feel of steel chains, rust, and abandoned spaces that will appeal to guitar industrial tastes -- this act lacks nothing technically. The unique direction may make them less accessible than similar industrial acts of the time, but the payoff is tremendous.