Monster Mash channel the early German speed/thrash scene — citing Vectom, early Blind Guardian, and Iron Angel as touchstones — with high-energy performances anchored by the versatile vocalist Lion. The band surfaced with the demo He Gambled with Satan and Lost, a three-song statement that mixes traditional and extreme thrash with tight cohesion.

Monstrath play old-school death metal with a heavy debt to Obituary and the brutal American 80s tradition, built on thick riffs and guttural delivery. The band signed to Swedish label Downfall Records and released the single "Child of God" in 2017, followed by the full-length The World Serves to Evil in 2018.

Montanha began their career rooted in classic heavy metal and hard rock before gradually shifting toward fuzzier, psychedelic stoner rock territory. The band introduced themselves with a self-titled EP in 2013 and later developed their heavier, riff-driven sound across subsequent releases including the full-length Alvorada.

Monte Cerrado launched with a self-titled two-track EP in March 2022, featuring the songs "Lose our Humanity" and "Fake" — an immediate showcase of their melodic power metal approach with an emphasis on strong hooks and soaring arrangements. The debut release landed on Spotify, Deezer, and Bandcamp simultaneously, signaling the band's intent to reach a wide audience from the outset.

An entirely instrumental trio of guitarist Paulo Tefili, bassist Cainã Almeida, and drummer Roger Benevenutti, Monte Resina move freely between stoner rock, shoegaze, sludge, and post-hardcore without ever settling into a single lane. Their album Aluado Bulimor (2018), recorded at Calamar Sounds in Florianópolis, was followed by the more melodically adventurous Nem Era (2025), cementing the band's reputation for textured, riff-forward instrumental writing.

Montosse was a depressive black metal duo — instrumentalist Astratta and vocalist Érdos — whose music drew heavily from H.P. Lovecraft's mythos, with the band's very name referencing a demon from The Evil Dead. Their 2019 release Pois os Mortos Viajam Depressa... showcased bleak, introspective songwriting that found a home on multiple Brazilian DSBM compilations before the project dissolved.

Montuln is a melodic black metal band from Concepción, Chile whose music draws on Mapuche imagery and indigenous themes from southern Chile. The band debuted with Espiritu Ancestral (2012), a seven-track release featuring song titles in Mapudungún, and followed it eight years later with Arquetipo (2020), released on CD through Australis Records.

Moonlight Scream began in 2012 playing death/black metal with themes of love and sorrow before pivoting toward an atmospheric, largely instrumental post-black metal sound in their later years. After a hiatus, the project resurfaced and eventually evolved into new incarnations — Ócio and then Passional — reflecting a continuous drift away from aggression and toward texture and mood.

Moonmath is a gothic/doom metal band from the interior of Rio Grande do Sul whose sound is heavy, melancholic, and psychologically dense, drawing on nihilism and introspection as core lyrical pillars. They have self-released two six-track albums — The Whisper's Hand (2017) and Isolated (released across 2018–2021) — both recorded locally and independently.