NoxEternum is a black/death metal band from Alto Paraná, Paraguay, active from 2022 until their split-up. In their brief existence they were prolific, releasing two full-length albums — "Portal to NoxEternum" and "The Black Window of the Mind" — along with two singles, all in 2022.

Nuclear Brains blend black, thrash, and death metal in a deliberately lo-fi package, with the four-piece openly acknowledging on their 2015 EP First! that limited resources shaped the recording — funded through gig ticket sales and made with more energy than budget. The lineup of guitarists and vocalists Cão Westphalen and Rafael Decarli alongside bassist Ivan Borba and drummer Doug Hanauer gives the band a dual-vocal abrasiveness that suits the genre-crossing aggression.

One of the more savage relics of the late-1980s underground, Nuctemeron played a brutal and primitive blackened noise-grind that positioned them alongside other uncompromising Brazilian extreme acts of the era. Their 1990 demo Industrial Pollution and the captured chaos of the 1991 live tape Last Massacre represent the entirety of their output, later compiled on the FOAD Records release Posers Mutilation 1989–1991.

Assembled during the pandemic in late 2021, O Espírito Profano wrote entirely in Portuguese and drew their themes from death, misanthropy, and spiritual suffering. Their short-lived run produced a self-titled release and a live EP recorded at the UFCAT university festival in Catalão, blending black, death, and doom metal into a dense and despairing sound before splitting up.

Formed by Daemon Lutor and Licantropo, Osculum Infame traffic in bestial black/death metal rooted in the Amazonian underground, releasing their debut Eras Abissais in 2017 and following it with Nuclear Alfa Caos in 2022. Their sound sits in the war metal tradition — raw, blasphemous, and relentless — and they have also appeared on splits including the Holocausto da Luxúria Bestial split with Bode Profanador.

Oscuro Mito is a black/folk metal band from Cochabamba, Bolivia, formed in 2008 and released through Catáfila Producciones. Their music draws heavily on Andean themes — Inca and Aymara culture, ancestral legends, and indigenous paganism — which sets them apart within Bolivia's extreme metal scene. The band released their debut full-length Yuraq Ushpa in 2019, following years of demos and split appearances including the 2015 compilation Holocausto Zine.

Formed in Belo Horizonte in 2012 by members steeped in Venom, Bathory, and Hellhammer, Ossuário play raw, uncompromising black/speed metal soaked in occult darkness and stripped-back aggression. Their debut EP Metal Antichrist (2016) established their reputation in the national underground, and the 2025 follow-up Metal Póstumo — released on cassette by Morbid Ways to Die and on CD by Cianeto Discos — continues that tradition with the current trio of Coveiro, Necrolsky, and Splatter.

Pabllo Vittar with Guns is a blasting extreme metal project that collides black metal, death metal, and grindcore into an unapologetically confrontational package, flying the flag for LGBTQIA+ representation in the heaviest corners of the underground. Their 2023 debut EP announced them with six tracks of ferocious, deliberately lo-fi noise and a title that leaves no ambiguity about who they're playing for.

A solo project built around bass-driven doom and black metal, Paranoid Existence orbits themes of Greek mythology and occultism through sparse, heavy arrangements. The project released a split with Parasito on Murdered Records (2018) before issuing the full-length Drakaina (2023) via Kvlt und Kaos, a six-track record centered on serpent mythology.