Taking their name from the Latin phrase meaning "we strive for what has been forbidden," this black metal trio — Prometheus on vocals, Draco Bellator on guitar, and Summum Luison on drums — operates within a framework of occultism, philosophy, and left-hand-path humanism. Their 2014 EP Lançamo-nos Rumo ao Proibido established them in the Goiás underground, pursuing a cold, uncompromising style rooted in old-school black metal aesthetics.

Noctem Aeternus is a solo atmospheric black metal project founded in 2015 in Córdoba, Argentina, built around a single multi-instrumentalist who composes and records all material independently. The project released its debut full-length, Winter Spells, in December 2017, followed by Landscape of Discord in 2019 via German label Naturmacht Productions, and the EP My Spectre Around Me Night and Day in 2021, the latter drawing its lyrics from William Blake poetry.

Nocturn Decadence is a black metal project from Osorno, Los Lagos, active since 2016, blending raw black metal with blackgaze and dark ambient textures around themes of loneliness, nature, and existential contempt. The band self-released two albums independently: Impavida Muerte in March 2017 and Sirviente del Psicodelico Lenguaje Inconexo in 2018.

Nocturnal Delirium is a raw black metal act from Isla de Maipo, Santiago, originally operating as Delirio Nocturno from 2007 before adopting the current name. The band is signed to Ukrainian underground label Depressive Illusions Records, through which it released the demo Abyss I and the split album Memories with Askaroth in 2016, with lyrical themes centered on darkness, paganism, loneliness, and hate.

Nocturnal Hate is a black metal band founded in mid-2017 in Sincelejo, Colombia by vocalist Macabre and drummer Alzagorath. The band explores themes of darkness, Satanism, rituals, and paganism, releasing their debut demo Hate in 2023 through Mortecina Records. They remain an active independent act based in the Sucre department of northern Colombia.

Nocturnal Terror was a one-man black/speed/thrash project driven entirely by Evokator of Storms — handling all guitars, bass, drums, and vocals — with Venom, Hellhammer, Sodom, and Bathory as its declared cornerstones. The project released a series of recordings including the debut full-length Bestial Messiah and the EPs Blasphemous Crushing of Angels and Tormentor, the latter leaning deliberately into first-wave speed metal primitivism.

Nocturnal Winter operate in the most obscure tier of the northeast underground, playing raw corpse-painted black metal with no concession to modernization. The band released two full-lengths — Shaitan a Face da Revelação Iniciática in 2004 and Sadomarsonáculo in 2008 — and have maintained a near-invisible profile outside of dedicated Brazilian extreme metal circles ever since.

Nordeath deal in the unholy intersection of speed and black metal, drawing equal inspiration from Bathory, Kreator, and Cruel Force as from Brazilian forebears Sarcófago and Whipstriker. Their 2018 debut EP O Chamado do Abismo announced a band committed to old-school underground ugliness, and they have since been signed to Norway's Edged Circle Productions, with a full-length following.

The solo project of Kavera, Northern Forest merged raw black metal aggression with expansive dark ambient passages inspired by the Amazonian landscape and the themes of seasons, night, and misanthropy. Releases including the album Natureza and the cassette A Eternal Winter on Depressive Illusions Records captured a desolate, nature-saturated sound rooted deeply in the northernmost reaches of Brazil.