La Sombra del Caminante is a groove/thrash metal band from Bogotá, Colombia, formed in 2018 and releasing through Thrashing Colombia. The band explores themes of life, philosophy, and storytelling, and released their debut full-length "Androides y manzanas" in 2020 followed by an EP in 2023.

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.

Lascados are a thrash metal and crossover hardcore band from Anápolis, Goiás, Brazil, who have been active since the early 2010s. The band has released several full-lengths through their Bandcamp page, including Humanos Pertubados Questionáveis, Cotidiano Duro de um Trabalhador, and Chinese Lasquera. Expanding from a power trio to a four-piece in 2025, they remain one of the few metal acts operating out of Anápolis.

Last Conscious are a death/thrash metal band from Santa Luzia, Minas Gerais, Brazil. The band has released recordings including Psychological Torture, Damn Thoughts, and Political Loathing, drawing on the aggressive traditions of Brazilian extreme metal. Their lyrical content spans psychological and political themes.

Lazaro is a thrash metal band from Rafael Castillo, Buenos Aires, founded by guitarist Jorge Moreno following his departure from the long-running Argentine thrash act Serpentor. The band carries on the tradition of socially and politically charged thrash metal from the Greater Buenos Aires underground scene.

Legacy of Kain is a groove and thrash metal band from Curitiba, Paraná, Brazil, featuring guitarists Angelo Torquetto and Karim Serri, both veterans of bands including Doomsday Hymn and Desertor. The band released their debut album I.N.V.E.R.S.O in 2017, sung entirely in Portuguese, followed by Paralelo XI in 2019, and has toured Argentina as part of regional metal festival circuits.

Legion is a thrash metal band from La Plata, Argentina, whose lineup includes Nicolas Liendo on guitar and vocals, Rafael Garritano on guitar, Sergio Carrizo on drums, and John Williams on bass. Their debut album "Gran Mal" was recorded and mixed at Dormir Sucio studio in Berisso during 2016 and released in 2017. The band draws on the tradition of Argentine thrash acts such as Hermética and Horcas.

Lei do Cão is a crossover thrash band from Mossoró, Rio Grande do Norte, Brazil, formed in 2008. Their debut full-length Possuído pelo Tubarão was released in September 2008, delivering eight tracks of fast, aggressive crossover blending thrash and hardcore punk. The band also appeared on a split release with Crippled Fox in 2011, cementing their place in the Brazilian underground crossover scene.

Letargia is a crossover/doom/thrash metal band from Campo Limpo Paulista, São Paulo, Brazil, formed in 2001 and associated with Kill Yourself Productions. The band released the "Stragado EP" in November 2006, recorded at The Magic A.S.O.M. studio with founding members Pacu on guitar and vocals and Mindu on drums. Their music mixes crossover thrash with doom-inflected heaviness and themes of sex, drugs, and rock 'n' roll.