Sulphur Aeon channel blackened death metal from Waltrop in Westphalia, drawing heavily on Lovecraftian cosmic horror for their thematic material. Their albums have earned them widespread acclaim for combining crushing death metal with otherworldly, oceanic atmospheres that evoke the dread of cosmic entities.

Sulphur Seas practice black metal from Madrid, channeling oceanic darkness and sulfuric atmospheres through their compositions. Active since 2015, they bring chemical-sea imagery to the Spanish capital's black metal scene.

Krasnodar's Sulphur Sovereign practice black metal from the Kuban capital since 2022. Their brimstone-ruler name channels the infernal authority of hell's element into compositions of southern Russian darkness.

Turin's Sulphureum practice black metal from the Piedmontese capital since 2022. Their sulphurous name channels hellfire and brimstone imagery into compositions of atmospheric, infernal intensity.

Sult (Danish for "Hunger") practice black metal from Copenhagen, channeling the genre's voracious intensity from the Danish capital. Active since 2012, their name references Knut Hamsun's seminal novel, adding literary depth to their extreme output.

Sumerian Tombs practice black metal from Cologne, drawing on ancient Mesopotamian themes to fuel their dark compositions. Formed in 2021, they bring archaeological depth to the Rhineland black metal scene.

Sumeus (Finnish for "Haziness") combine black metal with ambient from the Finnish underground, creating blurred, atmospheric compositions. Formed in 2023, they bring misty darkness to the Finnish black metal scene.

Summers of Emesh craft progressive black/doom metal from Berlin, blending atmospheric complexity with crushing heaviness and cosmic themes. Formed in 2023, they bring Sumerian-mythological depth to the German capital's progressive extreme scene.

Summoning Hellgates forge black/death metal from Madrid, opening infernal portals through extreme compositions. Emerging in 2025, they bring hellish intensity to the Spanish capital's underground.