Amazarak is a São Paulo black metal band with roots going back to 1997, when they operated under the name Mandragora before adopting their current name around 2001. The band deals in Satanic and anti-Christian themes, and their discography includes the 2009 full-length "Ascensão do Anticristo", a 2016 split with Nervochaos, and the 2023 release "Impuro Armagedom". Tracks like "Hino de Blasfêmia" and "Comando Blasfêmia" have circulated widely in Brazilian underground metal circles.

Amen Corner is one of the pioneering black metal bands in Brazil, formed in 1992 in Curitiba, Paraná, and widely regarded as a foundational force in the development of the country's extreme metal underground alongside acts like Murder Rape. Drawing influence from Venom, Celtic Frost, and Bolt Thrower, the band forged a sound characterized by diabolic weight and aggression, releasing landmark early albums including "Fall, Ascension, Domination" (1994) and "Jachol Ve Tehilá" (1995). Their 2024 album "Written by the Devil", released through Dutch label Hammerheart Records, marked their first international licensing deal after over three decades of activity.

Amort is a black metal band from Diadema, São Paulo, Brazil, formed in 2007 and still active. Based in the industrial ABC Paulista region just south of São Paulo, the band draws on Satanic and blasphemous lyrical themes common to Brazilian black metal, operating independently as part of the country's underground extreme metal scene.

Amorth is a Brazilian bestial black metal duo formed on August 19, 2023, consisting of Necro Anticristo on vocals and drums and Lord Bloodshed on guitar. Operating in the war metal and bestial black metal tradition, the band released the EP "War Against Christ" in July 2024 and a split with Necrovomit 666 titled "Desecrating the Nazarene" the same year, channeling raw, chaotic anti-Christian extremity.

Amplexus Mortem is an occult black metal band from Guaíba, Rio Grande do Sul, Brazil, formed in 2019. Their music draws heavily on chaos gnosticism and left-hand path philosophy — particularly Qliphothic Kabbalistic symbolism — and they have been prolific, releasing numerous albums and EPs including "Qliphothic Paths of Sitra Achra" (2019), "The Eleven Seals of Azerate" (2021), and "Antinomian Paths of Death" (2021).

Amud is a Christian black metal (unblack metal) band from Belo Horizonte, Minas Gerais, Brazil, formed around 2019 and still active. With members Anderson Nogueira Shu, Samuca Nogue, and Rafinha Nogue, the band wields black metal aggression in service of explicitly Christian themes, countering Satanism with their lyrics — a tradition in Brazilian unblack metal. Their discography includes multiple demos such as "Deuses de Pedra Não Salvam!" (2012), "Fogo no Cão" (2014), and "Perdeu Capeta" (2017).

Amuro was a black metal band from Florianópolis, Santa Catarina, Brazil, active from 2013 until their split-up. The band explored symphonic black metal textures and performed live in the Santa Catarina underground circuit, sharing members with the local heavy metal act No One Spoke; their setlists included originals such as "Will To Death" and "Misanthropy" alongside covers of Norwegian black metal classics.

Anax is a black metal band from Fortaleza, Ceará, Brazil, formed in 2011. Hailing from one of the largest cities in Brazil's northeast, the band operates in the underground black metal tradition, contributing to the region's gradually expanding extreme metal scene.

Ancestral Cântico is a black metal sextet from Salvador, Bahia, whose sound blends occult ritual atmosphere with shamanic repetition and hypnotic riffing drawn from forebears like Mercyful Fate, Venom, Bathory, and Rotting Christ. Their thematic territory spans ancestral spirituality, witchcraft, hermeticism, and anti-colonial consciousness, setting them apart within Brazil's underground. They released their debut full-length Ancestrais Dizeres Profanos in 2015, followed by Cânticos Lunares (2018) and the sprawling Hermético Caminho dos Saberes Ocultos in 2024 via Sangue Underground Records.