Hiereus is a symphonic black metal band from Rio de Janeiro, Brazil, formed in 2021. The band released their debut full-length Após o Portal do Oeste, a twelve-track album recorded in 2019 and mixed and mastered by Gabriel Cabral at Vampire's Studio, released through Mountain Distro/Prod.

High School Massacre is a death metal and grindcore band from Curitiba, Brazil, formed in 2011 by Marcelo Mattos and Weliton Lisboa with the explicit aim of writing fast, short songs in the death/grind style. The band self-released a six-song demo in 2012 and followed it with the EP Alienation, recorded at Avant Garde Studio; vocalist Larissa Pires is known for her powerful guttural delivery.

El Hijo de la Aurora (Spanish for "Son of the Dawn") is a Peruvian doom metal and psychedelic rock band formed in Lima on May 2, 2008, by drummer and composer Joaquín Cuadra and guitarist Manolo Garfias. The band has explored themes of witchcraft, occultism, and philosophy across four studio releases, including Lemuria (2008), Wicca: Spells, Magic and Witchcraft Through the Ages (2010), and The Enigma of Evil (2015), with the latter released through Minotauro Records.

Hikan was a one-person depressive black metal project from Curitiba, Brazil, active from 2015 until its dissolution. The project released three recordings: The Cycle of Pain (December 2015), A Breath of Sorrow for a Dying Spirit (September 2016), and Begotten (March 2018), all available via Bandcamp and noted for their bleak, introspective character.

Hinarivm is a black metal band from Belo Horizonte, Brazil, dedicated to the exploration of Luciferian occultism and formed in 2018. The band released their debut album Et Sapientia... on May 7, 2018, followed by Vltra Terminvm Creatvrae Ex Lvcifer Coronatvs in March 2023 via Black Hearts Records.

Hocnis is a thrash and death metal band from Belo Horizonte, Brazil, active since 2010. The band released the Demo(niac) in June 2010 and the three-track EP SS Ourang Medan in October 2016, the latter taking its name from the legendary ghost ship story and available across major streaming platforms.

Hoctaedron is a death metal band from São José dos Campos, Brazil, formed in 2003. The band released the demo "Celebration of Bloodshed" in 2003, a four-track recording featuring tracks such as "Human Incineration" and "Pleasures of Flesh." The band has since split up but their recordings remain available on Bandcamp.

Hokmoth is a black metal band from Curitiba, Brazil, featuring guitarist Yuri Seima and drummer Mario Kmiecik. The duo released their debut EP "Neophytvs" in October 2019, a five-track work with themes described as poetic representations of mental and spiritual processes. Their lyrics and art are oriented around what they call the dark and rejected side of all things.

Holder of Souls is a heavy metal band from Bragança Paulista, São Paulo, Brazil, formed in 2019. The band's lineup includes Daniel Bueno on vocals, Tiago Schievenin and Rafael Cintra on guitars, Emerson Paulo on bass, and Daniel Franco on drums. They released their self-titled debut album in September 2019, a nine-track effort spanning just under 52 minutes.