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.

Aeternal Nox is a melodic death/black metal band from the La Candelaria neighborhood of Bogotá, Colombia, formed in 2022 by a collective of professional musicians with roots in independent metal projects. The band draws from black and death metal traditions, building their lyrical world around existentialism, nihilism, and occult mythology. They release independently and have published material through their Bandcamp page.

Agalarieth are a black metal band from Valdivia, Chile, who released the demo "Dark Path Begins" in 2011, recorded at Black King studio in Valdivia and issued as a pro-CDR limited to 300 copies. The four-track demo was also distributed on cassette through labels including Anti Cosmic Productions and Depressive Illusions Records.

Agaurez is a black metal band from Belo Horizonte, Brazil, originally formed in 1998 and reconstituted in 2013 after a lengthy hiatus. Their debut "Un-Virtue-Vitae" (2002) on Demise Records represented traditional keyboard-driven black metal, but their second album "The Five Sigils" — released on the prestigious Brazilian label Cogumelo Records — marked a heavier evolution incorporating death and thrash metal elements. Thematically rooted in rational anti-Christian ideology, Nietzsche, and occultism, the band is one of Belo Horizonte's more enduring extreme metal acts.

Ages of Blood is an Argentine black metal project formed in 2020 that works with themes of medieval mysticism, anti-Christianity, and occultism. The band released the demo Pagan Medieval Aristocracy in May 2020, followed by the full-length Vestiges of a Fallen Empire in August 2021, and then Chronicles of Abyssic Flames in November 2023. The project was released through His Wounds and is currently on hold.

Agnata Fides are an atmospheric black metal and dark ambient band from Patos de Minas, Minas Gerais, formed in April 2014 by a four-piece lineup including NaWotam on bass and vocals and DDøS on guitars and keyboards. Their self-titled debut album, released in November 2014 on Depressive Illusions Records and recorded at Aethyr Home Studio in Patos de Minas, blends raw black metal aggression with keyboard-driven ambience around themes of Luciferianism and Hyperborean mysticism.

Agnideva are a black metal band from Campina Grande, Paraíba, formed in 2009 and operating independently in Brazil's northeastern underground scene. Their lyrical focus is rooted in Vedic paganism and anti-Christian occultism, making them a rare voice in Brazilian black metal drawing on Hindu spiritual imagery rather than the genre's more typical Satanic or Norse frameworks.

Agonic Autumn is a solo black metal project by the musician known as Black Tormentor, based in Linares, Maule, Chile, founded in 2020. The project has released two albums: "Agonic Reflections" in December 2020 and "The Last Flame of Life" in December 2023, with all instruments recorded by Black Tormentor at Arkaiko Studio in Constitución.