Dead Congregation is a Greek death metal band from Athens formed in 2004. The band have released two full-length albums, two EPs, and a split release with Hatespawn. They released their latest full-length album Promulgation of the Fall on May 5, 2014, through their own label, Martyrdoom Productions, and on November 7, 2016, they released their EP 'Sombre Doom'. The band's name is derived from the title of a song written in their previous band Nuclear Winter.

Incantation is an American death metal band that was formed by John McEntee and Paul Ledney in 1989. They are one of the leaders in the New York City death-metal scene along with fellow bands Suffocation, Mortician and Immolation, even though the band is currently located in Johnstown, Pennsylvania. To date, the band has released twelve full-length records, two live records, four EPs, two singles, three splits, one DVD, and three demos. Their most recent album, Unholy Deification, was released through Relapse Records in August 2023. The band have maintained a significant cult following and underground popularity since the '90s, and are considered to be highly influential on a range of later death metal bands including Dead Congregation, Grave Miasma, and Portal, who are often described as "cavernous death metal". Incantation's music frequently draws on anti-Christian, Satanic, and occult themes, and the band is notable for mixing widely varied tempos into their music, often playing slow, down-tuned passages similar to those performed by death-doom bands like Autopsy.