Acutor is a thrash/black metal band from Bogotá, Colombia, formed in 1993 and regarded as a seminal force in the Latin American metal underground. Their 1997 debut album "Dios Ha Muerto" — sung entirely in Spanish with nihilistic and anti-religious lyrics inspired by Nietzschean philosophy — established them as one of the genre's earliest and most distinctive voices on the continent. They have shared stages with major Colombian and international metal acts and remain active on the Viuda Negra Music label.

Ad Baculum is a black metal project from Salvador, Bahia, led by Lord Hades — formerly the vocalist of legendary Brazilian cult act Mystifier — who handles all instruments except drums. The band's debut Blackness Doctrine (2011) drew directly from the raw black/death vein Hades helped pioneer in Mystifier, while the third album Opening the Abyss (2016), released on Brazilian Ritual Records, shifted toward slower, doom-saturated tempos with howling, cavernous vocals and cover art taken from Gustave Doré's illustrations of Dante's Inferno.

Ad Extremum is a black metal band from Brasília, Brazil, formed in 2013 and signed to Nox Bellum Prod. Their music explores themes of Satanism, occultism, and suicide, rooted in the raw, atmospheric tradition of Brazilian black metal.

Ad Inferno is a Brazilian black metal project that emerged in 2022, featuring members drawn from Campo Grande, Curitiba, and Rio de Janeiro. Their debut full-length "A Senda do Abismo (Spiritus Pestilens)", recorded and released in late 2022, presents a cold, underground black metal aesthetic.

Adaga — Portuguese for "dagger" — is a black metal band from São Paulo, Brazil, built around the duo of Anderson Ribeiro and Fabrizzio Hanoi. Their 2019 EP "Spawning Black Seeds" channels themes of darkness, occultism, and chaos through a stripped-down, underground black metal attack.

Adrammelech is a black metal horde from Joinville, Santa Catarina, Brazil, formed in 2018 and oriented around themes of primordial gnosis, war, and Hyperborean mysticism. The five-piece — operating under pseudonyms including Masterwolf, Daswolf, Hades, and Terror — released a self-titled demo in 2018 on Battlefront Distro.

Adumbrall is a black/death metal solo project from Euclides da Cunha, Bahia, Brazil, formed in 2020 by Athayde Neto, who also plays in the band Wiseblood. A one-man operation, Neto handles all instruments, vocals, and lyrics, channeling themes of nature, philosophy, enlightenment, horror, and lust across releases including "Through Passion, Through Pain, Through Blood" and "In a Blaze of Order."

Aeri Satur is a black metal and dark ambient project from Sorocaba, São Paulo, Brazil, active since 2023 under the creative alias Sagarana. The project blends raw and depressive black metal with dungeon synth and experimental atmospheric elements, incorporating literary references to Tolkien, Guimarães Rosa, and Florbela Espanca into its Portuguese-inflected songwriting. Their 2024 album "Vreedas" exemplifies their oneiric sound, weaving extended compositions through cosmological and philosophical themes.

Aeshma is a black metal band from Governador Valadares, Minas Gerais, Brazil, originally formed in 2002 and later relaunched around 2019. The band operates in the underground Brazilian black metal tradition, drawing on themes of darkness and misanthropy, with founding member Nocturnus Tepesh serving as vocalist and guitarist throughout the project's lifespan.