Imperium Dekadenz is a black metal duo from Villingen-Schwenningen, Germany, featuring Horaz (guitars, keyboards, vocals) and Vespasian (guitars, bass, drums, keyboards), active since 2004 and exploring metaphors of human transience and Roman Empire aesthetics. Their albums — from Procella Vadens (2010) through Into Sorrow Evermore (2023) — are praised for their atmospheric, melodic black metal wrapped in a warm but powerful sound.

Black metal band from Kouvola in southeastern Finland, formed in 2024. Their Latin name — meaning 'imperium of summoning' — adds ritualistic gravitas to their black metal.

Imperium Infernalis is a black metal project from Heraklion, Greece, active since 2013 and forging dark, aggressive extremity within the Greece black metal scene. The project channels the unrelenting intensity of the genre.

Imperium Sacrum is a project from Bielefeld, Germany, active since 2003, evolving from ambient origins into atmospheric black metal territory. Over two decades, the band has shifted from pure soundscape composition to incorporating the tremolo-driven aggression of black metal.

Black metal band from Kuopio in eastern Finland, active since 2016. Their sound channels raw black metal from the Savo lakeland.

Impiety is a black metal band from Sommerda, Germany, active since 2013, forging uncompromising black metal from the Thuringian countryside. Not to be confused with the Singaporean war metal act of the same name, this German incarnation pursues its own path through atmospheric darkness.

Impious Vesper is a black metal project from Modena, Italy, active since 2020 and forging dark, aggressive extremity within the Italy black metal scene. The project channels the unrelenting intensity of the genre.

Impium is a black metal band from the Basque Country, Spain, active since 2005, forging atmospheric black metal for two decades from the culturally distinct Basque region. The band's name — Latin for "impious" — signals their blasphemous intent.

Impius is a black metal/dungeon synth project from Spain, active since 2019, blending the raw aggression of black metal with the medieval atmosphere of dungeon synth. The band channels fantasy themes through a dual-genre approach that spans extremity and ambient composition.