Los Angeles crossover outfit Septik Onslaught have been tearing up the Southern California scene since 2017, fusing hardcore aggression with the breakneck riffing of thrash metal. Their sound sits in the classic crossover tradition — short, mean songs built for pits and chaos — with a modern edge drawn from the city's diverse extreme music community. They remain one of LA's most energetic live acts in the crossover/thrash lane.

Formed in 2017 in Scarborough, Maine, Septus play traditional heavy metal with roots clearly set in the classic American and British molds. Their music leans into the kind of riff-driven, melodic songwriting that defined the genre in its foundational era, delivered with a directness that suits the no-frills New England scene they come from. They are a straightforward heavy metal band in the best sense of that description.

Ohio-based Sepulcher formed in 2024 operating at the violent intersection of death metal and grindcore. Their music combines the technicality and brutality of death metal song structures with the explosive, short-burst intensity of grindcore, resulting in something chaotic and unrelenting. As a brand-new act they have already staked out an extreme and punishing corner of the Midwestern underground.

New Brunswick, New Jersey's Sepulchromancy arrived in 2023 fusing the murky brutality of death metal with the reckless speed of thrash. Their approach recalls the classic death/thrash hybridization of the late 1980s and early 1990s underground, updated with a raw modern production sensibility. They represent a worthy continuation of the New Jersey extreme metal tradition that has long thrived in the shadow of New York.

Sepulchrum emerged from Irving, Texas in 2023 trafficking in raw black metal of the most unadorned and primitive variety. Their music strips the genre down to its coldest essentials — corrosive tremolo, lo-fi production, and an atmosphere of total hostility — rooted in the underground black metal ethos that eschews refinement by design. They are part of a quietly growing raw black metal presence in the North Texas area.

Minneapolis sludge metal outfit Serac have been at work since 2015, channeling the cold, bleak energy of the upper Midwest into slow, crushing riff structures. Their music bears the weight of extended instrumental passages and a commitment to atmosphere that sets them apart within the dense Minneapolis heavy music scene. Named after the unstable ice formations that precede glacier collapse, their sound evokes that same slow-building, inevitable devastation.

Birmingham, Alabama act Seraphic Entombment have been crafting suffocating death-doom since 2019, drawing on the genre's most crushing traditions — glacial tempos, cavernous low-end, and an oppressive atmosphere that earns the city's heavy reputation.

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.

A fresh arrival out of Seattle, Seraphlesh formed in 2025 blending melodic death metal's harmonic sensibility with the raw aggression of straight-ahead death metal — one of the Pacific Northwest's newest entries in the melodeath tradition.