Noisy Swedish Black Metal / Black Ambient. "Casus Luciferi" is one of the truest forms of disturbingly beautiful ambient darkness. Rather than opting for the extreme loudness and obvious evil, "Casus Luciferi" is an eerie, subtle trip into a nightmarish dream world. Abruptum were one of the bands signed by late Mayhem co-founder Euronymous for his legendary cult label Deathlike Silence Productions. Many have have tried to label the band but the words of Euronymous still reflects the spirit of this band best when they signed to DSP in 1991. "Abruptum is the audial essence of pure black evil". 40 minutes of ambient hellish atmospheres and digital noise.