Fresh out of Huntington Beach, California, Secularis arrived in 2025 as one of the newest entries in the American black/death underground, combining the icy hostility of black metal with the visceral attack of death metal. Even at this early stage, the project signals a willingness to operate in the extremes where both genres converge most violently.

Rosemead, California's Send Them Sin have been active in the death metal underground since 2013, contributing to the dense and competitive Southern California extreme metal scene with a straightforward, riff-driven approach. Their music sits in the traditional death metal lineage — direct, brutal, and structurally familiar — executed with a commitment to the genre's core values rather than novelty. Over a decade of activity speaks to a resilience and dedication uncommon in the underground.

San Francisco technical/progressive death metal band formed in 2016, operating in a Bay Area tradition of cerebral extremity. Their music pushes at the architecture of death metal, favoring labyrinthine song structures and technical precision.

Los Angeles death metal act Septic Fumes formed in 2023 and quickly established a reputation for dense, suffocating brutality within the sprawling Southern California underground. Their music draws on the city's long tradition of brutal and old-school death metal, filtered through a modern contempt for polish. They are a young band with an ugly, uncompromising vision.

Hayward, California's Seraphim Defloration deal in the guttural end of brutal death metal, built on punishing rhythms, gurgural vocals, and the kind of relentless sonic violence that has defined the Bay Area's underground extreme metal scene since the band's 2015 formation.

Los Angeles death/thrash outfit Serpentance formed in 2019 and channel the old-school ferocity of both genres — tightly wound riffs, barked vocals, and the kind of no-frills brutality that keeps the Southern California underground honest.

Out of Arbuckle in rural Northern California, Serpentera have been delivering death/thrash metal since 2018 — a two-genre hybrid that puts the pedal down on aggression and channels the raw energy of both traditions into a compact, punishing sound.

Serpentine Dominion is an American death metal supergroup formed in 2009 by Killswitch Engage lead guitarist Adam Dutkiewicz, Cannibal Corpse vocalist George 'Corpsegrinder' Fisher, and former The Black Dahlia Murder drummer Shannon Lucas. The project originated when Dutkiewicz composed material specifically tailored to Fisher's vocal style, with lyrics written by Killswitch Engage vocalist Jesse Leach. The band released their sole self-titled album in October 2016 through Metal Blade Records, a record that balanced Fisher's brutal death metal delivery with Dutkiewicz's trademark melodic and groove-driven riffing.

Los Angeles-based Servile Conceptions blend blackened ferocity with death metal's brutality, threading cold, dissonant tremolo lines through a foundation of aggressive, mid-paced heaviness. Active since 2013, they occupy the dark and confrontational space where LA's underground extreme metal scene intersects with the philosophical blackness of the genre's European roots.