Blindado are an Argentine heavy metal band founded by members Charly, Jorge, Adrián, and Juan, who released their debut album "Distorsión" in 2007 through Hurling Metal Records, featuring driving riffs, extended guitar solos, and even a heavy metal take on the tango standard "Yira-Yira." A second album, "En Las Calles", followed on the same label before the band returned in 2017 with "Argentina Despierta", an independently released record with politically charged lyrics addressing Argentine society. They remain active today.

Blitzkrieg is a raw black metal band from Mossoró, Rio Grande do Norte, Brazil, formed in 2002 and now split-up. The band operated independently within the Brazilian underground black metal scene, releasing material through their Bandcamp page before ceasing activity.

Blixten is a female-fronted heavy metal band from Araraquara, São Paulo, Brazil, formed in 2017 by vocalist Kelly Hipólito. Drawing heavily on classic 1980s metal acts such as Iron Maiden, Dio, and Motörhead, the band released their debut EP "Stay Heavy" in 2018, featuring five original songs recorded at Távola Studio in Araraquara. The group has been notable in the local scene for championing women's visibility in Brazilian heavy metal.

Blood Eyes was a heavy and groove metal band from Lages, Santa Catarina, Brazil, active from 2010 until their split-up. The band operated as an independent act within the southern Brazilian underground metal scene, blending the rhythmic aggression of groove metal with traditional heavy metal influences.

Blood Flowing is a depressive and atmospheric black metal project from Nova Friburgo, Rio de Janeiro, Brazil, formed in 2025. The project describes its music as a personal confession rather than an artistic endeavor, releasing material including the album "To Live Is To Suffer... And I Am Tired Of Living" and a split with Old Ugly Trees. Their sound sits firmly within the depressive suicidal black metal (DSBM) tradition.

Blood Horror is a death metal band from Florianópolis, Santa Catarina, Brazil, formed in 2015 and currently on hold. The band emerged from the underground metal scene of Florianópolis and released material independently before going dormant.

Blood Insanity is a Brazilian raw black metal project formed in 2022, operating within the underground DIY black metal tradition. The project has released a self-titled demo and the single "Sexta-Feira Santa," working independently without label backing.

Blood Oath is a progressive death metal band from Concepción, Chile, formed in 2015, whose sound blends the feral aggression of late-1980s death/thrash with the technical sophistication of early-1990s death metal — often drawing comparisons to Sadus and Pestilence. After establishing themselves with the Malignant Manifesto promo (2015) and the mini-LP The Line Between (2017), they released their debut full-length Lost in an Eternal Silence through Caligari Records in 2023, a record noted for its prominent fretless bass work and complex rhythmic arrangements.

Blood Ocean is a thrash metal band from São Paulo, Brazil, formed in 2014 and still active. The band plays in the aggressive tradition of Brazilian thrash metal and operates as an independent act within São Paulo's underground metal scene.