Haeretic Winds is a black metal band from Teresina, Piauí, Brazil, active since around 2009. The band's themes center on anti-Christianity, Satanism, occultism, and war, operating as an independent underground outfit. Their releases include the EP Derrame o Sangue dos Puros and the recording Avante Tropas de Lúcifer.

Hairetikos is a black metal band from Moreno, Buenos Aires, formed in 2024, comprising vocalist Nestor, guitarist Alex, bassist Juan, and drummer Guido. Their debut EP L'eremita, recorded and mastered by Eduardo Casella at Estudio En La Nada in Moreno during winter 2024, was released on December 15, 2024, through La Resistencia Distro, and features seven tracks including Transmigración Cósmica and La Consagracion del Temor.

Hammergoat is a bestial death/black metal band from São Paulo, Brazil, featuring members associated with the Brazilian underground acts Evil and Dethroned Christ. The band released their debut full-length, Regeneration Through Depopulation..., in 2010 on Hammer of Damnation, a 30-minute assault drawing comparisons to Blasphemy and Hellhammer and including a cover of Sarcófago's "The Black Vomit." They also appeared on a split cassette with Swiss act Dakhma, released in 2018.

Haruspex is a black metal band from Presidente Prudente, São Paulo, Brazil, blending traditional black metal with blackgaze, ambient, and industrial influences. The band released a self-titled album on October 20, 2022, featuring members Yan Moroz on guitar and vocals, Eddie Freire on drums, and Rodolfo Charelli on synthesizers, with mixing and mastering handled by Jonathan Rissi. Their thematic material draws on historical and classical subjects, including dedications to the barbarian sackings of Rome.

Hass is a black metal project originating in Joinville, Santa Catarina, Brazil, formed in 2001 by the solo musician Enmys. The band has built an extensive catalogue of raw black metal releases, including the albums Unmoralisch Black Metal (2003), Unprocessed Dementia (2011), and Applause (2013), with activity continuing through subsequent years.

Hastio is a black metal and punk band from Buenos Aires that formed in 2015, playing short, raw tracks typically under two minutes. They released the SATVRNALIA EP on December 24, 2016, recorded at Electric Chesterland Studios, followed by their self-titled album on January 6, 2019, recorded and mixed at Estudios Del Valle by Nahuel Martinez. The self-titled album features seven tracks including "Combate," "Yog Sothoth (El señor de la galaxia)," and "Los ojos eternos."

Hate Gods is a Brazilian black metal project formed in 2021, working in the depressive and suicidal black metal style. The band released multiple recordings in its debut year, including the album Noctívago Autocídio Lucífugo and the EP Condescendência Extinta, both issued in 2021 through their Bandcamp page.

Havoc is a black metal band from Lages, Santa Catarina, Brazil, formed in 2001. The band's lyrical themes revolve around Satanism, death, destruction, and the apocalypse, rooted in the darker traditions of the genre. After early demos in 2003 and 2004, they released their full-length debut Icon of Destruction: Atrocity Divine in 2007.

Hazeroth is a Christian black metal (unblack metal) band from Santa Maria, Rio Grande do Sul, Brazil, active since 2013 in their current incarnation. The band occupies a distinct space within the Brazilian black metal underground, combining raw, aggressive black metal with explicitly Christian lyrical themes. Their discography includes the album Arsenal and the 2013 release Mene Mene Tequel Ufarsim, the latter issued as a limited edition of 200 copies.