Blood Trail is a thrash metal band from São Paulo, Brazil, formed in 2022 as a side project by Alex Roque, known from Disorder Of Rage and other Brazilian metal acts. The band released the EP "World Corroded" in April 2022, a tribute to old-school thrash with raw material rooted in 1990s sounds alongside modern production touches. The project operates independently and remains active.

Blood Warrior was a thrash/death metal band from São Paulo, Brazil, active from around 2010 before eventually splitting up. The band blended the aggressive riffing of thrash metal with death metal heaviness in the tradition of Brazilian extreme metal. They released music independently and are documented in the Encyclopaedia Metallum.

Bloodcraver are a thrash metal band from Duitama, Boyacá, Colombia, formed in 2014. They released their debut EP Skynet in 2018, a three-track independent recording produced in Colombia.

Blooddawn is a black metal band from Curitiba, Paraná, Brazil, with lyrical themes revolving around war, chaos, and evil. The band is signed to No Peace and has remained active in the Brazilian underground black metal scene. They are documented on the Encyclopaedia Metallum and maintain an independent presence on Bandcamp.

Bloodfire is a heavy metal band from Floriano, Piauí, Brazil, operating as an independent act. The band has released material including the single "In the Name of Metal," part of the EP "Dangerous Game," and maintains a presence on SoundCloud and social media. They are listed on the Encyclopaedia Metallum and represent the heavy metal scene in the interior of northeastern Brazil.

Bloodforge is a gothic/doom/heavy metal band from São Paulo, Brazil, known for blending female vocals with male and guttural vocals, drawing influences from doom metal, gothic metal, 1980s heavy metal, and 1970s progressive rock. The band released the EP "Forged" in 2005 and "Screaming Voices" in 2010, and completed recording on a full-length titled "Struggle" in 2016. The lineup features Estefania Bonfanti on vocals alongside multi-instrumentalists including guitarist Tiago Wolf and keyboardist Marcus Lopes.

Bloodgrave is a death 'n' roll band from Uberaba, Minas Gerais, Brazil, playing old-school death metal with rock-influenced grooves. The band's lineup includes Anderson on vocals, Dennis on guitar, Márcio on bass, and Rauy on drums. Active since 2014, they have shared music through SoundCloud and Bandcamp, operating independently within the Brazilian underground metal scene.

Bloodstained Resurrection is a black metal band from Antofagasta, Chile, formed in 2015, signed to Total Pagan Madness Productions, with lyrical themes spanning apocalypse, Satanism, and occultism. Their recorded output includes the Promo MMXIX, Flame's Veneration, and Praeludium ad Praecipitium releases.

Bloody Morgue is a death metal band from Porto Alegre, Rio Grande do Sul, Brazil, formed in 2015 under the name Infernal Warfare before adopting their current name. The band released a self-titled debut in 2016 and is currently an independent act, continuing to operate within the Rio Grande do Sul extreme metal underground.