LAC is a death metal band from Rio de Janeiro, Brazil, operating under the abbreviated name after years of activity as Lacerated and Carbonized. Under that earlier name the band released the album Narcohell (2016), recorded at HR Studios in Rio and mixed at Stage One Studios by Andy Classen, with lyrics reflecting the city's urban violence and social decay. The project continued under the LAC name and remains active on Vingança Music.

Lachrimatory was a doom/death metal band from Curitiba, Paraná, Brazil, originally formed in 1999 and recognized as a cornerstone of that city's doom scene. Their album Transient, first self-released as CD-R in 2011 and officially reissued by Russia's Solitude Productions in 2014, featured cello alongside keyboards and guitars to create dense, melodic atmospheres. The band split up by 2015, leaving Transient as their most widely distributed work.

Lacktor are a death/thrash metal band from Antofagasta, Chile, whose name is drawn from the Kunza word for "famine" — a language spoken by the Likan Antai, a pre-Hispanic civilization of the Atacama region. Combining old-school Swedish death metal with thrash, crust punk, and traces of black metal, the band delivers lyrics in Spanish addressing famine, social criticism, and historical colonialism. They released their debut full-length Hambruna in 2019 through Organic Waves Studios, followed by Legado in 2022.

Lacrima Mortis is a doom/death metal quintet from Blumenau, Santa Catarina, Brazil, formed in 2016 and known for a theatrical, ceremonial aesthetic that includes robed stage attire inspired by acts such as Sunn O))). They debuted with the EP Optare Mortem in 2017 before releasing their first full-length, Posthumous, through German label Talheim Records in 2020, a nine-track, 48-minute record featuring weathered death growls, Gregorian chants, and guest vocalist Laurent of French band Mourning Dawn.

Lacryma Sanguine is a death/doom metal band from Fortaleza, Ceará, Brazil, active since 2008 and among the few doom metal acts to emerge from the northeast of the country. They released their debut digital EP As The Autumn Ends in 2008 via KillZone Records, followed by their first full-length album Amongst These Walls in 2012, distributed by Chilean label FunerART, drawing on the melodic heaviness of My Dying Bride, Saturnus, and Swallow the Sun.

Lado Obscuro is a black metal band from Curitiba, Paraná, Brazil, operating in the tradition of Satanic and anti-Christian underground black metal. The band released the 7-inch Senhor das Trevas in 2006 on Intolerant Records, limited to 500 hand-numbered copies, alongside the demo Triunfo no Inferno issued the same year.

Lady Mortis is a doom/death metal project from Valinhos, São Paulo, Brazil, active since November 2017 and rooted in funeral melancholy with Portuguese-language themes of darkness and existential grief. The band has released several recordings including the EP Exiled from the Light and singles such as Snow Tears (2022), Winter Farewell Poem, and Darkened Emotions, building a catalog of slow, elegiac compositions.

Laftrache are a black metal and folk band from Villa Alemana, Chile, whose music draws from the legends of the Mapuche and Selknam peoples of southern South America. Their 2017 demo Voces Ancestrales features the Trutruca — a trumpet-like instrument made from colihue wood and cattle horn, created by the Mapuche — as well as a spoken-word sample of a native Selknam woman on the track "El Clamor Selknam." The band was released through Chilean underground label Kuyen Producciones.

Lamazuus is a symphonic and ambient black metal duo from Suzano, São Paulo, Brazil, formed around 2019, consisting of Misanthropy (vocals, keyboards, drums) and Asgardhel (guitar, bass). The band releases conceptual single-track recordings themed around characters from Magic: The Gathering and Tolkien, with titles including Elfo (Freyalise) (2019), Minotauro (Mogis) (2020), and a series of singles through 2021.