Misanthropy blends the heaviness of death metal with the atmospheric melancholy of gothic metal, crafting a sound rooted in themes of death and inner torment. Hailing from the Amazonian city of Santarém, the band later continued under the name Inner Sigh, carrying forward their emotionally-charged approach to extreme metal.

Misantropía is a thrash/black metal band from Villa Alemana in the Valparaíso region of Chile. The band's lyrical themes center on misanthropy, anti-Christianity, mythology, and darkness, operating as an independent, unsigned act within the Chilean extreme metal underground.

Misiva is a heavy metal band from Luján, Buenos Aires Province, featuring Damian Tus on vocals, Ezequiel Corsi on guitar, Pablo Golia on bass, and Lucio Ascani on drums. Their 2020 self-titled EP, recorded at Chivo Records Studios by producer Luis Salvatierra, contains three original tracks and a cover of V8's classic "Lanzados al Mundo," situating the band squarely in the tradition of Argentine heavy metal.

Missas Negras operates in the Satanic and occult tradition of Brazilian black metal, building their sound around themes of sexual magic, anti-Christianity, and sadomasochistic ritual. Active since 2014 and entirely independent, the band represents the uncompromising underground black metal spirit of the Mato Grosso do Sul scene.

Mistetaret fuses raw black metal with expansive ambient passages, conjuring a sound that evokes vast nocturnal spaces and cosmic isolation. The project debuted in 2023 with the eleven-track album Mysteries of Stellar Nights Lost in the Infinite Void, establishing an ambitious aesthetic that blurs the line between harsh metallic fury and contemplative soundscapes.

Mistreated channels the classic 80s heavy metal and hard rock sounds of Iron Maiden, Judas Priest, and Black Sabbath through a modern lens, built around the chemistry between vocalist Henrique Radünz and guitarist Emanuel Murialdo. The band recorded their debut album Brand New Rust (2021) entirely independently at Load Studio Audio and Video in Pelotas, funding the sessions through cover show performances.

Mistwrath is a Satanic black metal act from Rio Grande do Sul operating in the raw underground tradition. The band formed in 2017 and is aligned with the Impure Lust Cult label network that supports Brasil's uncompromising black metal underground.

Mítica is a Progressive/Power Metal project from Quito, Ecuador, formed in 2022 by a collective of established Ecuadorian musicians alongside international guests. The band's stated mission is to preserve and promote Ecuadorian cultural identity by setting the country's principal legends to music in a style they call "Metal Opera Equinoccial." Their 2022 release "El Pacto de Cantuña" adapts the famous Quito colonial legend into a theatrical metal format.

Mitosis is a metal band from Cipolletti, Río Negro, formed in 2005 by members of the defunct Voz Natal, with a core lineup of Kiri Marchan (guitar/vocals), Milton Márquez (guitar), Toto Cufari (bass), and Agustín Barbosa (drums). They released three albums — Un motivo de existencia (2008), La razón del hoy (2011), and Alto en el fuego un imperio sanguíneo (2015, mastered by Mario Breuer) — and shared stages with Sepultura and A.N.I.M.A.L. before the band dissolved in early 2023.