HDLNKGS was a raw black metal project from Ponta Grossa, Paraná, active from 2018 until their split-up. The project released the EP Pone Diabolus Custodiam in May 2022, a three-track independent digital release documenting their stripped-down, lo-fi approach to Brazilian black metal.

Hecate is a black metal band from Fortaleza, Ceará, Brazil, whose lineup features vocalist Lord Thanatos, guitarist Pagan Priestess, drummer Daymon, and bassist Misantropico Herege. The band released the full-length album Odes ao Oculto in 2003 and the EP V.I.T.R.I.O.L. in 2014, with lyrical themes centered on paganism, occultism, and satanism. They are signed to Sphera Noctis Records.

Hedendom is a pagan raw black metal project from Buenos Aires, driven by vocalist and lyricist Javert Nihil with session guitar and bass contributions from Gon Rillo. The project released its self-titled demo in 2015 — a four-track cassette featuring songs including "The Shadows," "Whisper in the Night," and "Spectral Fall" — which was distributed physically through Triumphant Cadaver Label in Sweden. Javert Nihil has run multiple one-person projects since 2010, with Hedendom as the primary black metal outlet.

Hell Poison is a one-man speed/black metal project from Teresina, Piauí, Brazil, created by the musician known as Deathhammer in 2015. The project draws heavily on Motörhead, Venom, Hellhammer, and Bathory, delivering raw and aggressive material across a prolific run of releases including Speed Metal Burns Your Mind (2017), Speedfreak Demons (2020), and Breathing for the Filth (2021). Hell Poison is distributed through Metal Scrap Records and has also appeared on a split with Brazilian band Thundertank.

Helliancy is a black metal band from Assis, São Paulo, Brazil, formed in 2017. The band plays old-school Brazilian black metal and released their debut EP "Alliance From Hell" in February 2017, a five-track recording featuring tracks such as "Church Destroyer" and "Carnivore Christ". They have continued releasing material independently through Bandcamp.

Hellishkiller is a black metal band from Paulista, Pernambuco, Brazil, formed in 2017. The project is largely the work of a single multi-instrumentalist handling vocals, bass, and guitar, with Leandro Cavalcanti on drums, and released the track "Unholy Black Spell" in January 2017 as their first recording. The band appeared on the 2016 Brazilian compilation "Coletânea Abissal" with the track "Celebrate the Day of Chaos".

Hellstorm is a black metal band from Raul Soares, Minas Gerais, Brazil, formed in 2010. The band self-released a one-sided LP in 2010 and followed it with the self-titled EP in 2014, both available through their Bandcamp page.

Heosphoros is an archaic black metal band from Córdoba, Argentina, formed in 2022 and drawing comparisons to Greek acts like Rotting Christ, Varathron, and Necromantia. Their debut demo "Aster Obscuration" (January 3, 2022) — a four-track cassette release — was picked up for physical distribution by labels including Fallen Temple, Warhemic Productions, and Nuclear Winter Records.

Hermonh is a one-man black/death metal project from Osorno, Chile, operating under the name Pattross. The project debuted in 2025 with the EP "Ex Luto Deus Barbariae," a three-track release featuring tracks Azael, Barbarie, and Nephilim.