Mudness is a stoner-doom trio featuring Renan Casarin on guitar and vocals, Fernando Dal Bó on bass, and Pedro Silvano on drums. Their 2023 self-titled debut, recorded at Célula Showcase studios in Florianópolis and produced by Leandro Lazzarotto, delivers seven tracks of heavy, riff-driven doom that circles themes of human fragility and social decay.

Mudrost is a black metal solo project by Hellsgaard, born in Curitiba in 2022 and prolific from the start. The project released "Melancholy State of Soul" in August 2022 and followed it with "Sanctum Regnvm" in January 2023, establishing a cold, uncompromising sound rooted in orthodox black metal traditions.

Muerte Akción is a crossover thrash band from Santiago, Chile, formed in 2012 by guitarist/vocalist Rodrigo de las Riberas, bassist Sandino Muñoz, and drummer Rodrigo Herrera. Their politically charged lyrics tackle themes of colonialism, inequality, and Chilean social tensions, with releases spanning the 2012 EP through the albums Fuego (2014), II (2015), and Dominio (2022).

Mufa is a São Paulo extreme metal act that draws equally from death metal brutality and hardcore aggression, keeping a stable lineup since 2011 while channeling outrage at social rot into relentlessly violent music. Their 2015 debut full-length "Brutality Show", recorded at Magma Studio, showcases their genre-defying blend with tracks like "NarcoViolence" and "Disposable Human Race".

A stalwart of the Goiânia metal scene, Mugo mixes death metal heaviness with thrash energy and pronounced groove, drawing comparisons to Obituary and At the Gates. Their discography spans multiple full-lengths including "Go to the Next Floor" (2009), "Race of Disorder" (2017), and "Tempest" (2019), each refining their brand of extreme metal with elaborate harmonies.

Muireterium builds atmospheric black metal that drifts between cosmic and natural imagery, weaving soaring synths and coiling guitar textures into vast, meditative soundscapes. The project released the nature-worshipping "Ode to the Nature" in 2017 and followed it with the space-themed "The Eternity Aura" in 2018, both issued through Depressive Illusions Records.

Mulmeyun is a Santiago-based extreme metal project blending symphonic, black, and gothic doom elements, with the project's first release, the two-track EP A Tale of Love, appearing in September 2018. The band uses a Vocaloid voice bank as vocalist, an unusual choice within the Chilean metal underground, and has released a steady stream of material including Struggle (2020) and An Ancient Calling (2021). Thematically, the project frames suffering and sacrifice as necessary responses to modern nihilism and existential despair.

Municion is a black/thrash metal band from Santa Fe, Argentina who built a live reputation sharing stages with international acts including Aura Noir, Mystifier, and Tsjuder. The band released the EP "Black, Speed & Evil" in 2015 through Execracion Distro before issuing their debut full-length "Fukk Off In Hell" in 2021 via Alkolik Holocaust Records.

Munkill is an extreme metal band from San Carlos de Bariloche, Río Negro, whose founding members include vocalist/guitarist Demogorgon Malignum, bassist Malice Misanthropic, and drummer Sebastian Ortega. Their debut album "Suicide Or Homicide" was recorded at Insight Producciones and released in September 2012, followed by "Ambition and Destruction" in 2020, recorded in quarantine and mixed by Agustin Ortega at Demogorgon Malignum Producciones.