I Proélefsi is a Chilean one-person black metal project by a musician credited as M., who handles all instruments, orchestral arrangements, programming, artwork, recording, mixing, and mastering. The project blends instrumental atmospheric and avant-garde black metal with dark ambient influences drawn from bands such as Emperor, Setherial, Abigor, and Limbonic Art, and released its self-titled debut EP on July 4, 2025 — a five-track conceptual work tracing a journey from emptiness through strength and contemplation toward liberation.

Iconoclastarum XXI is a black metal band from Joinville, Santa Catarina, Brazil, formed in 2021 as a continuation of the project previously known as Jegfalt, which had been active since 2018. The band released "Demo XXI" on April 7, 2021, a nine-track recording made at Daswolf Studios between October 2018 and February 2019. Their lyrical themes draw on literature and philosophy.

Igni Dare is a black metal band from San Cristóbal, Táchira, Venezuela, formed in 2003 and drawing on themes of darkness, Luciferianism, and paganism. The band issued a full-length debut, "Preludio," in 2012, followed by the EP "Presage" in 2015 and a split release in 2017. Their Bandcamp describes the project as rooted in the "union of fellowship and brotherhood," with lyrics inspired by nature and occultism.

Ignis Gehennalis is an instrumental atmospheric black metal project from Buenos Aires that was founded in 2023 and has been prolific since its inception, releasing the EP Ecclesia Daemonica in August 2023 and 7th Circle in December 2023. The project continued with the EP INFERNO in June 2024, building a Dante-themed body of work entirely through self-released Bandcamp recordings.

Imopectore was a heavy/doom/black metal band from Sorocaba, São Paulo, Brazil, drawing on dark, obscure themes across their self-released material. Operating as an independent underground act, the band blended slow doom weight with black metal atmosphere and traditional heavy metal elements. The project eventually split up after a limited activity period in the Brazilian underground scene.

Impacto Profano is a black metal band from Rio de Janeiro, Brazil, founded with the explicit aim of delivering fast, aggressive, and technically sharp black metal. In 2006 the band recorded the demo "Invocation to Destruction of Jehovah and Christianity", which also included earlier material recorded as "Propagation of the Blasphemy" as bonus content. They have remained active within the Brazilian underground black metal scene since their formation.

Imperador Belial is an old school black metal band from São Gonçalo, Rio de Janeiro, Brazil, formed in 2013. The band released the album "Morbid Rites" in 2013 through Narcoleptica Productions, followed by "Curse of Belial", establishing themselves as consistent contributors to the Brazilian black metal underground. Their sound is rooted in raw, orthodox black metal tradition.

Imperial Dusk is a black metal band from Santa Maria da Vitória, Bahia, Brazil, whose prolific discography includes the albums Satanic Emperor (2011), Northern Hordes (2014), and Dimensions of Shadows (2015). The band is a trio featuring vocalist/guitarist Nocturnus, bassist Mortem, and drummer Aeternal, recording at Cripta Studio in their hometown. Their sound draws on raw second-wave black metal traditions with themes of Satanism and occultism.

Imperium Infernale is a black metal trio from São Paulo, Brazil, composed of vocalist Áscaris, guitarist/bassist Morbius, and drummer Impaler, with a discography spanning from 2006 to 2014. The band draws on second-wave black metal influences, blending raw aggression with melody, and delivers material largely in English with some Portuguese lyrics. Their work has been noted by Brazilian metal press as among the stronger domestic black metal acts.