Nefarious Murmur practice an occult brand of doom-laden black metal from the Paraíba interior, drawing inspiration from Urfaust, Rotting Christ, and Isengard. Their releases include the demo Ercidium Unreal and the EP IX: Aeterna Paganus Heremita, presenting a slow, ritualistic approach rooted in demonology and esoteric themes.

Nefastus is a death metal band from Formosa, Argentina whose self-titled debut EP, released in 2023, drew notice from Metal Forces Magazine for balancing brutality with melody across five tracks. Drummer Ives Lescano's work was specifically highlighted in that review, with tracks spanning from thrashy direct assault to more technical mid-tempo arrangements.

Nefelibata Arcana is a Colombian Symphonic Atmospheric Black Metal solo project, active since 2024. The project released a debut EP "Lucem Eclipsim" and a full-length "Ecos Desolationis et Redemptionis" in 2024, drawing listeners into expansive, introspective soundscapes of haunting melodies and ethereal atmosphere rooted in despair.

Nefelio announced themselves with A Peregrination Wombwards, a 44-minute debut released in May 2022 through Those Opposed Records, earning praise for its elaborate and dense approach to atmospheric black metal. The album's seven tracks weave melodic black metal grandeur with doom-paced heaviness, placing it among the more ambitious debuts to emerge from the current Brazilian underground.

Born from members of Disfigured By Hatred, Nefärioüs D-saster channel the raw fury of Anti Cimex and D-beat punk through a death metal filter on releases like the 2018 Worship Disaster EP and the 2018 split Total Disaster. Their sound is a deliberately abrasive collision of nuclear-age dread, war imagery, and underground punk nihilism.

Negative Delusion deal in straightforward old-school death metal rooted firmly in the 1990s tradition, as heard on their 2018 debut album Claustrophobic. The nine-track record leans into claustrophobic riff structures and mid-paced brutality, placing them squarely in the lineage of early Florida and Swedish death metal.

Negative Summer — featuring guitarist Elton, drummer Allison, and bassist/vocalist James — play a raw, old-school-inspired grindcore informed by foundational recordings rather than contemporary acts. Their 2024 demo, recorded live at VTM Estúdio and released through LessthanZer0 Productions, delivers three blasts of sub-five-minute noise and grind fury.

Negativo is a one-man depressive black metal project run by Solfieri Süskind Angst, channeling raw misery through sparse, suffocating arrangements. The 2024 EP "Quimeras em Desatino" captures the project's bleak aesthetic across five tracks of lo-fi DSBM in the vein of the early Brazilian underground.

Negativus blends old-school death metal with groove-laden heaviness, drawing on the sounds of Obituary, Entombed, and Celtic Frost while writing all their lyrics in Portuguese. Their 2024 debut "Detestabilis" features vocalist Eduardo Jarry alongside guitarist Thyago Trajano, bassist/guitarist Victor Hugo Targino, and drummer Eduardo Amorim, delivering ten tracks of punishing, mid-paced brutality.