Bagronk is a death/black metal band from the southern suburbs of Greater Buenos Aires, Argentina, with roots going back to an early 2000s formation. The band recorded the demo "Death and Blood Valley" and has built a persistent presence in the Argentine underground extreme metal scene across multiple active periods.

Beelzeebuth was a death/black metal band from São Paulo, Brazil, that formed and dissolved within the 2020s as an unsigned underground act. Distinct from the similarly-named Beelzeebubth from Salvador, this São Paulo project operated in the raw, extreme end of Brazilian death-black metal — a tradition with deep roots in the city's prolific underground scene — before splitting up after a brief run.

Bewitchment is a one-man death/thrash metal project from Rio Grande da Serra, São Paulo, Brazil, helmed by Rodrigo "Infectz" Costa. The project draws heavily on old-school death metal influences, particularly the early works of Death and Pestilence's "Malleus Maleficarum" era, blending those sounds with thrash aggression. The project released the full-length "Oblivion Shall Reign" (2019) in a limited pressing of 500 copies through multiple Brazilian underground labels including Rapture Records and Extreme Sounds Records.

BlackForce is a death/thrash metal band from Niterói, Rio de Janeiro, Brazil. The band is signed to Profane Records and addresses themes including politics, religion, and the environment in their music.

Blowpipe is a death/thrash metal band from Campinas, São Paulo, Brazil. The band draws direct influence from the major thrash metal acts of the 1980s and death metal bands of the 1990s, and released a self-titled album in September 2020 through their own Blowpipe Records imprint. Their lineup includes Jean Quiles on vocals, Gedeon Alves on guitar, Edynho Baiochi on bass, and Johnny Hoglan on drums.

Bode Maldito is a one-man black/death/thrash metal project from Rio Grande do Sul, Brazil, operating within the Brazilian underground extreme metal scene. The project released the demo "Sodomizing Christ" digitally in 2024, with a limited physical edition of 33 copies issued in late 2024 by Poland's Unpure Records as part of their DIY Ungodly Underground Series. Lyrical themes revolve around Satanism and anti-Christianity.

Break the Ice is a death/thrash metal band from São Paulo, Brazil, formed in 2013. The band released a demo tape in 2015 featuring tracks such as "Agony" and "Blessed Death," recorded and mixed by Ugo Héon. They have since split up.

Brutal Death was a death/thrash metal band formed in 2011 in Rio Branco, Acre, Brazil. The band operated in the underground extreme metal scene of the Amazon region before disbanding.

Brutal War is a death/thrash metal band from Santa Maria da Vitória, Bahia, Brazil, formed in 2006. The band incorporates Christian and apocalyptic themes into their music and have released albums including "Hell is Real", "Revelation 666", "Warmageddon", and "Rage of Destruction".