Effective period / Period of releases: 2000 - 2024

Members: Chris Maycock, Sanford Parker, Wargoat Obscurum, Tony Laureano, Will Lindsay, Zack Simmons, Blake Judd, Zion Meagher, Peter Kenar, Jeff Wilson (4), Noctis Herre, Mike Le Gros, David Swanson (3), Charlie Fell, Andrew Markuszewski, John Porada, Pat Clancy (2), Neil Jameson, Jon Woodring

Nachtmystium was formed by Blake Judd (Azentrius) in early 2000. Black Metal band from Wheaton, Illinois, USA. Some of the music on early demo tapes was written as early as 1998, but the band was not established until early 2000.
The Band disbanded in 2020.

There have been a slew of session members over the years, but Judd has always been the primary songwriter and the one constant performer.

CURRENT MEMBERS
Blake Judd - lead and rhythm guitars, vocals
Pat Clancy - Guitars

FORMER MEMBERS
Vocals
- Zmij (2000-2001)
- Kriglord (2001-2002, also guitars, keyboards)

Guitars
- Jeff Wilson (2006-2010)
- Mike Le Gros
- Sinic (on "Instinct: Decay")

Bass
- Zion Meagher (2000-2001)
- Marcus Kolar (2001-2002)
- Chris Black (also keyboards)
- Gazulmaug (Session, on "Demise")
- Neil Jameson (aka Lord Imperial) (Session, 2005)
- Will Lindsay (on "Addicts: Black Meddle, Part II")
- Jon Woodring (aka Jon Necromancer) (2008-2009, also backing vocals)

Drums
- Pat McCormick (aka Noctis) (2000-2002)
- David Swanson (aka Grave (3), G. Reymond) (2002)
- Matt Block (aka Xaphar) (2002-2003)
- Wargoat Obscurum (2003-2006)
- Jean Graffio
- Tony Laureano (Session, 2008-2009)
- Zack Simmons (Session, 2008-2009)
- Markus Launsburry (Live, 2009; also guitars on "Instinct: Decay", and live bass, 2006)
- Bob Fouts (Live, 2009)
- Jef Whitehead (aka Wrest) (Session, on "Addicts: Black Meddle, Part II")