|Nachtmystium is an American psychedelic and extreme metal band formed by Blake Judd (aka Azentrius) and Pat McCormick.
Nachtmystium was originally founded by Blake Judd and Pat McCormick as a side project. The band was heavily influenced by second-wave black metal bands, such as Darkthrone and Burzum, evidenced in their low-fi first release Reign Of The Malicious in 2002. The band's next release, Demise (2004), was described by Judd as Nachtmystium's "last straight forward 'raw black metal' record." The band's following two releases, Eulogy IV (2004) and Instinct: Decay (2006), incorporated psychedelic and experimental musical elements that were pioneered by bands like Black Sabbath and Pink Floyd. Instinct: Decay received general positive feedback from critics. Deaf Sparrow Zine, praised the album for its innovation, while Decibel Magazine went even further to name Instinct: Decay as the fourth best album of 2006. Their band's latest release, Assassins: Black Meddle, Part 1 was released on June 10, 2008 in America.
Nachtmystium's line-up has frequently changed since its formation. Furthermore, while the band originally started as a black metal band, and even toured with well-known black metal acts such as Angelcorpse, Goatwhore, and Watain, Judd has frequently stated that the band should not be considered black metal per se. In an interview with Deaf Sparrow Zine, Judd stated, "What separates us from your average black metal band is that we're NOT a black metal band, we're a 'do-whatever-the-fuck-we-want' metal band and black metal happens to be what we build our foundation off of (in the case of Instinct: Decay and its predecessors), if you must categorize the rhythm sections of our music (rhythm guitars, bass and drums - the core of any album)." J. Bennet of Decibel Magazine described the band's sound as "Blackadelia".