The Order of Apollyon is a black/death metal side project formed by members of Aborted, Akercocke, Aosoth, Arkhon Infaustus, Cradle Of Filth, Goat Torment, Hell Militia, and Temple of Baal. They have released two full-length albums and are currently working on their third. Their music is a blend of death and black metal with martial ambient influences, and their lyrics focus on the divine nature of death and the prophecy carried on by death's ultimate servant, man.

Blue Hummingbird On The Left's long-awaited debut album, Atl Tlachinolli, is a union of fire and water, bringing forth the sacred war. The album features indigenous instruments flowing like water alongside the fiery force of pagan black metal. The release is a collaboration between IRON BONEHEAD PRODUCTIONS, Nuclear War Now! Productions, and Crepúsculo Negro. The album was released on December 10, 2018. The review from Metal-Archives states that the album is a big advance into the alternative metal mainstream and that BHOTL plays fairly straightforward raw BM compared to the other bands that play fusion extreme BM psychedelia.