Blackpest was a black metal band from João Pessoa, Paraíba, Brazil, active from the early 2000s until around 2015. The band pursued a misanthropic and nihilistic aesthetic, with lyrical themes centered on intolerance, depression, and hatred.

Blackthorny is a black metal band from São Paulo, Brazil, active since 2011. The band released their debut album Profane Crown of Thorns in 2011, establishing themselves in the Brazilian underground black metal scene with occult-themed material.

Blasart is a black/death metal band from Santiago, Chile, founded by guitarist Eduardo Vera, who had previously played in the brutal death metal group Orategod. The band debuted with the full-length The Art of Blasphemy in 2008, followed by the Rebellion Abyss Chaos EP in 2014 and the Depravatus EP in 2022; their sophomore full-length Depravatus Christianis Sacris was released through Czech label Lavadome Productions in March 2026. Their anti-Christian lyrical themes are matched by a sound that blends black metal atmosphere with death metal weight and sharp thrash metal aggression.

Blasphematorium is a heavy/speed/black metal band from São Paulo, Brazil, formed around 2020 and signed to Tales from the Pit Records. The band released a self-titled debut album in February 2020, drawing on occult and blasphemous themes in the vein of classic South American extreme metal. Their sound fuses the drive of speed metal with raw black metal atmosphere.

Blasphemia was a black/thrash metal band from San Felipe, Valparaíso, Chile, with lyrical themes centered on apocalypse, anti-religion, and chaos. The band released two demos and one EP between approximately 2001 and 2005 before splitting up.

Blood Rites is a black metal band formed in Santiago, Chile, in 2016, later operating from Berlin, Germany, with a sound rooted in the Hellenic black metal tradition of the late 1980s and drawing comparisons to Impaled Nazarene, Thou Art Lord, and Ancient Rites alongside South American underground fierceness. Their Demo 1 was released on cassette through Caverna Abismal Records in 2018, followed by the Cursed Blood 7" EP in 2021 and the full-length Diabolical Mystical Ritual through Invictus Productions in 2026.

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.

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.

Bode Preto (Portuguese for "Black Goat") is a black metal band from Teresina, Piauí, Brazil, formed in 2010. The band debuted with the "Dark Night" EP in 2010, followed by their full-length album "Inverted Blood" in 2012, which was recorded at Atlantis Studio and featured guest guitar work from ex-Sarcófago member Fábio Jhasko on three tracks. Their sound blends the rawness of black metal with elements of death metal and grindcore.