Conjurador is a black/death metal project from Porto Alegre, Rio Grande do Sul, Brazil, formed in 2021 with themes centered on Satanism and occultism. The band released multiple demos in their first year of activity and followed up with the EP "Conjurers of the Infernal Key" in 2022.

Conquistadores is a thrash/heavy metal band from Osasco, São Paulo, Brazil, formed in 2016. The band performs Portuguese-language metal, with tracks such as "Lutar e Conquistar" and "Guerreiros do Metal" reflecting themes of battle and metal pride. They have played live at local São Paulo-area venues including Arena Metal SP and remain active on the regional scene.

Consecuencias is a death/sludge and hardcore band from the western suburbs of Buenos Aires, Argentina, formed around 2019 by Ivann on vocals, Ezequiel on bass, Faka on drums, and xMarc on guitar. They self-recorded their Demo 2018 across various locations in the west of the city and later released the full-length Todo Abismo Calma Sus Ojos, delivering politically charged extremity with a raw, DIY ethos.

Conspiracy was a death/thrash metal band from Presidente Prudente, São Paulo, Brazil, active in the early 1990s before splitting up. The band was an independent act within the Brazilian extreme metal underground scene of that era. They are documented on Encyclopaedia Metallum as part of the wave of São Paulo-interior bands that emerged alongside the broader Brazilian thrash and death metal movement.

Consumed is a death metal band from Quillota whose recordings have appeared through Chilean extreme metal label Mushantufe Productions, including the EP "Dehumanize to Demonize" (2015) and the rehearsal cassette "Profanation" (2017). Their lyrical focus on anti-religion, misanthropy, and blasphemy situates them within the blasphemous Chilean death metal underground.

Contemptible Ruins is a death metal and crust punk band from Brasília, Brazil, formed in 2021. Their sound blends stenchcore and death metal influences, drawing comparisons to the rawer end of the crust/death spectrum. The band has released several recordings including a self-titled debut (2021), "The Radicalization of Human Pathology" (2022), and "Point of No Return" (2023).

Contempty is a death/doom metal band from Rio Pomba, Minas Gerais, Brazil, formed in 2013. Influenced by the early English death/doom scene, their music is characterized by dark atmosphere and slow, heavy compositions. Their discography includes "Gaping Deception in Guiltless Eyes" (2013), "Trauma" (2015), and the single "Presage of Penury" (2021).

Convulsive is a Brazilian old-school death metal band formed in 2020, with members split between Cuiabá (Mato Grosso) and Rio de Janeiro, who composed and recorded their debut entirely remotely. Their first album, "The Grotesquery Ruins of Death" (2022), drew praise for its thick, murky sound reminiscent of early 1990s Finnish and American death metal, and earned an 8/10 from Metal Forces Magazine. The project grew out of members' involvement in other Brazilian extreme metal bands, including Feretral and Obscure Relic.

Conxuro is a folk metal band from Mar del Plata, Argentina, formed in 2007 and built around a full ensemble that includes guitars, bass, drums, keyboards, violin, and flute. The band released La Rueda de la Fortuna in 2012 and their second album Fuego Interior in 2017, recorded at Estudio Mix in Mar del Plata, with vocalist Agustin Raimondi fronting a lineup that has featured members such as Valeria Barbas on flute and Daniela Nazar on violin.