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 Inferi is a symphonic metal band from São Paulo, Brazil, formed in 2020 from the ashes of the symphonic outfit Sacra. The group features vocalist Alessandra Lodoli alongside guitarist Lucas Moretto, and released their debut album "The Immaculate" with the single "The Red Lake" as an early showcase of their orchestral, dramatic sound.

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.

Adagio is an atmospheric death/doom metal band from Araraquara, São Paulo, Brazil, active from the mid-1990s through the early 2010s before going on hold. Their 1999 album "Romantic Serenades", released on Megahard Records, epitomizes their mournful, melancholic approach that blends death metal heaviness with slow, grief-laden doom atmospheres.

Adaia is a power metal band from Cartago, Valle del Cauca, Colombia, formed in 2011 by guitarist Jorge Soto, vocalist Cristian Badillo, and drummer Jaime Guzmán. The band crafts melodic heavy metal centered on themes of freedom, hope, death, and love, drawing on the classic power metal influences the members grew up with. They operate as an independent act and released early material including the 2013 single "Muerto en Vida."

Adamah is a Christian heavy metal band from Carapicuíba, São Paulo, Brazil, founded in 2014 as a project by guitarist and composer Marcos Siqueira and vocalist Alex Souza. The band channels traditional heavy metal songwriting with lyrical themes drawn from faith, delivering driving riffs and melodic hooks.

Addam's Nightmare is a progressive and melodic metal band from Buenos Aires, Argentina, founded in 2014 by guitarist Reaper O'Brian, later joined by Fear Monta on bass and Nico Granatera on drums. The band released their debut EP "Halloween For All" in November 2014, a four-track release that established their blend of progressive arrangements with melodic heaviness. What began as a conceptual side project quickly solidified into a fully active band within the Buenos Aires underground scene.