Baalberith was a raw black metal band from São Luís, Maranhão, Brazil, active from around 2002 and eventually split up. The band recorded two demos — Porco Destronado (2005) and Escalada Triunfante (2007) — before releasing Black Metal Militia on CD-R through Depressive Illusions Records in 2013. Their lyrical themes centered on blasphemy, hate, and profanity in the uncompromising tradition of South American black metal.

Bael was a black metal band from Santo André, São Paulo, Brazil, formed in 2024 and short-lived. Emerging from the Greater São Paulo underground, the band pursued the raw and nihilistic black metal aesthetic before splitting up the same year they were founded. Their brief existence places them within the dense web of São Paulo-area black metal acts working in the underground tradition.

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.

Baphometh were a black metal band from Porto Alegre, Rio Grande do Sul, active in the early-to-mid 2010s before splitting up. Porto Alegre has produced a distinct strand of Brazilian black metal influenced by both the raw South American tradition and Northern European styles, and Baphometh operated within that underground, releasing material independently with occult and adversarial themes.

Baphometron is a Black Metal band from Manizales, Colombia, founded in 1998 and currently based in Pereira, Risaralda. They operate under Dark Circles Productions and released their debut demo "Baphomilenios" in September 2023, a two-track recording sung in Spanish.

Barrabás is a black metal band from Assis, São Paulo, whose music is built around the cosmic horror mythology of H.P. Lovecraft. Their 2013 full-length The Arrival of Yog-Sothoth, released on Nyarlathotep Records with members Kadax Azuhos, Paulo Portes, and Oksarrak, works through the entire Lovecraftian pantheon — Cthulhu, Shub-Niggurath, Nyarlathotep, Azathoth — in nine tracks of raw, ritualistic black metal.

Basmasura is a black metal band from Manaus, in the Brazilian Amazon state of Amazonas. One of the few metal acts from the isolated northern city, the band operates in the raw, underground tradition of Brazilian black metal with minimal web presence outside their Metal Archives listing.

Beastkrieg is a bestial black thrash metal band from São Carlos, São Paulo state, Brazil, formed in 2013. Drawing from the classic South American extreme metal lineage — Sarcófago, Impurity, Holocausto, and Mystifier — alongside old-world forebears Venom, Bathory, and Hellhammer, the band plays blasting, blasphemous black-thrash rooted in lust, Satan, and chaos. Their 2014 album "Graveyard Rite (Alcoholic Ceremony of Baphometic Worship)" captures the raw, primitive spirit they operate in.

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.