Beyond the Grave is a thrash metal band from Itaquaquecetuba, São Paulo, Brazil, with lyrical themes centered on war, death, and religion. The band released the full-length album "Predictions of Disgrace" in 2016 through Kill Again Records, their second studio effort, recorded at No Limits Estúdio in Arujá. They have maintained an active presence in the Brazilian underground thrash scene with additional demo and compilation appearances.

Big Bastards are a Santiago groove and D-beat metal band who released their self-titled five-track debut in September 2021. The record is a raw and direct statement of political and social rebellion, with tracks like "Hijos del fuego" and "Muere por tu lider" driving home its confrontational edge.

Bio Terror are a black/thrash metal band from Chillán, Chile, operating in the tradition of South American necro metal with themes of anti-Christianity, destruction, and war. Their 2023 compilation "Blasfemia, Sodomia y Muerte," released on limited cassette through Spain's Profaner Records, gathered material from across the band's entire history alongside live recordings from a 2021 show in Talca.

Black Goat Spell is a thrash metal and crossover band from São Paulo, Brazil, formed in 2021. The band incorporates influences from Afro-Brazilian spiritual traditions such as orixas and umbanda into their aggressive crossover thrash sound, setting them apart in the Brazilian underground. They released their self-titled debut material in 2025 via Bandcamp.

Black Mass was a Black/Thrash Metal band from Belém, Pará, Brazil, formed in 2013. Operating out of northern Brazil’s oldest metal city, the band blended raw black metal aesthetics with thrash metal aggression. They released music independently, including material available through their Bandcamp page, before splitting up.

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.

Blackgoat Holocaust was a black/thrash metal band from Belo Horizonte, Minas Gerais, Brazil, active briefly before splitting up. The band was an independent underground act exploring themes of death, lust, and destruction in the tradition of the Brazilian extreme metal underground.

Blackning is a thrash metal band from Santo André, São Paulo, Brazil, formed in December 2013. The band has released three studio albums — Order of Chaos (2014), ALieNation (2016, nominated for best national heavy metal album at the Prêmio Dynamite de Música Independente), and Awakening Rage (2023) — and toured Europe in 2017, visiting Germany, France, the Netherlands, Belgium, Poland, the Czech Republic, and Russia.

BlankWar is a progressive thrash metal band from Bragança Paulista, in the interior of São Paulo state, Brazil, formed in 2016. The band released a self-titled debut album in 2016 and subsequently put out a single titled "BloodSuckers," carving out a niche within Brazil's active underground thrash scene.