Seas of Stone deliver atmospheric sludge and post-metal from Dresden, building monumental, layered compositions that shift between crushing heaviness and expansive atmosphere. Active since 2010, they've been one of Saxony's most compelling post-metal voices for over a decade.

Sebum XS channel sludge, drone, and doom metal from the Lorraine capital of Nancy, building thick, oppressive compositions from the eastern French city. Active since 2017, they bring excess-sebum heaviness to the Lorraine underground.

Segundo Impacto ("Second Impact") channel hardcore, death, and sludge metal from Madrid, creating a punishing multi-genre assault. Formed in 2020, they bring devastating crossover energy to the Spanish capital's underground.

Atmospheric sludge metal collective from Knokke-Heist featuring the unusual lineup of two guitars and two bass players, creating walls of low-end heaviness since 2008. Their albums "Psychedelic Bugtown" (2008) and "Chasing Swans" (2010) explore themes of political activism and personal liberation through dynamic, genre-bending compositions.

Turin's Sepsi deal in doom and sludge metal since 2025. Their medical-sounding name, suggesting sepsis, implies a music that spreads through the body like a slow, systemic infection of heaviness.

Septic Apes deliver stoner and sludge metal from Jyvaskyla, building hazy, primate-themed compositions from the central Finnish Lakeland. Active since 2012, they bring infected simian grooves to the Keski-Suomi stoner scene.

Septiembre Negro ("Black September") channel doom and sludge metal from Fuenlabrada near Madrid, building crushing compositions with politically charged overtones. Formed in 2023, they bring heavy, deliberate darkness to the Madrid metropolitan area.

Serpent Eater combine sludge, black, and death metal with crust punk from Cologne, creating a hydra-headed beast of extreme aggression. Active since 2012, they're one of the Rhineland's most ferocious crossover acts, refusing to be limited by genre boundaries.

Stockholm's Serpent Omega pair sludge and doom metal from the Swedish capital since 2013. Their name combining the serpent with the final Greek letter channels apocalyptic reptilian menace into over a decade of crushing compositions.