Sigillum Diabolicum conjures black metal from Clermont-Ferrand, the volcanic heartland of central France, active since 2010. Their name, Latin for 'seal of the devil,' anchors an occult-themed approach to raw, uncompromising black metal.

Como's Sign of Evil channel black metal from the shores of the famous Lombard lake since 2023. Their name references both classic Sodom and the spiritual darkness they explore in their atmospheric compositions.

Signaux du Vide, meaning 'signals from the void,' is a French raw black metal project incorporating dark ambient elements, launched in 2024. Their compositions oscillate between harsh, lo-fi black metal passages and cavernous electronic drones.

Sigon forge speed, heavy, and black metal from the Finnish underground, combining three classic metal styles into a volatile fusion. Emerging in 2025, they bring multi-genre velocity to the Nordic scene.

Siimes practice black metal from the eastern Finnish city of Joensuu, channeling the genre's dark intensity from the North Karelian capital. Active since 2012, they bring forest-shade darkness to the eastern Finnish underground.

Sikaryus practice black metal from Bochum, drawing their name from the ancient Jewish dagger-wielding assassins (Sicarii). Active since 2017, they bring historical menace to the Ruhr Valley's black metal scene.

Silberbach ("Silver Stream") channel black metal from the tiny Franconian village of Sachsen bei Ansbach, their pastoral German name contrasting with the genre's harsh intensity. Active since 2014, they bring rural Bavarian atmosphere to their atmospheric output.

One-man cinematic folk black metal project from Leuven, launched in 2024, whose releases "Towards the Chimaera" and "Where Our Coils Collide" blend atmospheric black metal with folk instrumentation and cinematic grandeur. The project's name references sacred groves of Celtic religion, reflecting a deep engagement with pagan mythology.

Silent Leges Inter Arma ("Laws Are Silent Among Arms," from Cicero) practice black metal from Rostock on the Baltic coast, filtering classical Latin philosophy through extreme metal's confrontational lens. Active since 2012, they bring an intellectual dimension to Mecklenburg-Vorpommern's black metal scene.