Maurício Filho is a São Paulo-based shred guitarist whose instrumental work blends heavy metal riffing with technically demanding lead guitar. His discography includes releases such as "The Pumpkin Night" EP and the 2020 album "Season of the Mad Pumpkin," which showcase his high-speed picking and melodic sensibility rooted in the classic shred tradition.

Mausoleum were a death/black metal outfit from São Paulo whose lyrical themes circled around paganism and occultism, a common thread running through releases spanning compilations such as "Southern Warriors Cult #1" (1999) and "War... Satanic Victory!!!" (2003). Their output also included "10 Anos de Bestial Massacre" in 2004 and "O Retorno à Batalha" in 2006, cementing a two-decade presence in the Brazilian underground before the band eventually dissolved.

Maverick channel groove-heavy riffing through a thrash and metalcore lens, with socially charged lyrics that address dehumanization and internal conflict. The band built a steady catalog including "Quid Pro Quo" (2014), "Cold Star Dancer" (2018), "Ethereality" (2021), and "Silver Tongue" (2024), demonstrating consistent growth in both production and songwriting since their founding by vocalist/guitarist Gabriel Sernaglia and drummer Gustavo Polississo.

Mawashi Geri fuse progressive death metal with the atmosphere and mythology of traditional Japanese culture, drawing on legends of the underworld for their lyrical and sonic identity. Their 2022 debut album "Yomi Yokai" is a concept record built around creatures from the Japanese realm of the dead, pairing technical death metal structures with distinctly Eastern melodic textures across eight tracks.

Mawiza is a Mapuche metal band from Wallmapu, Chile, formed in 2021 as the successor to Nunca Seremos Dichosos—a project that won the Pulsar Award (Chilean Grammy) for Best Metal Artist in 2020 for the album Kollong (2019). Performing in Mapuzungun, their ancestral language, and integrating traditional Mapuche instruments and rhythms into groove metal and metalcore, Mawiza have drawn international attention from acts including Slipknot and Gojira, the latter's Joe Duplantier appearing on their debut album ÜL (2025) on Season of Mist. Their work is as much a statement of Indigenous cultural preservation as it is a metal record.

Mayday is a progressive groove metal band from Santa Fe, Argentina, built around core members Octavio Sobrero and Joel Dergal (guitar), Lucas Chelini (drums), alongside vocalist Juan Suárez and bassist Juan Fiume. The band recorded their debut EP "Resiliente" at Junín Sessions in Santa Fe, mixing and mastering it with producers in Florida and New York, and released a follow-up EP "Neron" in 2024. Their self-described "Pure Grill Metal" blends heavy riffs with progressive structures and complex rhythmic arrangements.

This Belo Horizonte thrash/death metal band took their first stage alongside Chakal and Aamonhammer at the Black Death Festival in 1987, placing them among the earliest acts in the formative Brazilian extreme metal underground. The band later renamed themselves The Mist in 1988 and continued recording and performing under that name through the 1990s before eventually reviving.

Maze of Madness play straightforward heavy and thrash metal with a raw, stripped-back energy, releasing their debut album "Mass Hatred" in July 2022 shortly after forming. The eight-track record plants the band firmly in the tradition of classic thrash aggression without straying far from the genre's foundational template.

Mazemath is a thrash and death metal band from Santiago, Chile, formed in 2015. Their debut album The Illusion of Freedom, released in 2016 and recorded at AudioCustom Studios in Santiago, introduced the band's aggressive approach to politically and cosmically charged lyrical themes including environmental destruction and political corruption.