Sycomore evolved from blackened sludge metal into sludge metal with noise rock elements in Amiens, active since 2016. Their stylistic journey reflects a restless creative spirit that pushes against genre boundaries while maintaining core heaviness.

Sycronomica craft melodic black metal from Munich, blending harmonic sophistication with the atmospheric intensity of black metal. Formed in 2019, they bring temporal-themed darkness to the Bavarian capital.

Sylff explores progressive and post-black metal from Arras in northern France, active since 2018. Their compositions weave atmospheric expansiveness into black metal's harsh framework, creating a sound that breathes with emotional depth.

Sylisium practice black metal from the Rioja town of Haro, channeling the genre's dark intensity from the heart of Spain's premier wine region. They bring nocturnal darkness to the vine-covered Rioja landscape.

Kraków's Syllogomania practice black metal from the ancient capital since 2025. Named for the compulsive hoarding of printed material, their psychological condition name channels obsessive accumulation into atmospheric compositions.

Symawrath evolved from symphonic black metal into industrial/electronic rock from the Catalan town of Constanti, tracing a dramatic stylistic transformation. Their Tarragona-area project reflects the genre-fluid spirit of modern Catalan heavy music.

Symptoms of Sickness, originating in Sweden before relocating to Portland, have been crafting ambient black/doom metal since 2013. Over a decade of channeling the clinical manifestation of disease into compositions of atmospheric, glacially paced darkness across two continents.

SYND practice black metal from an undisclosed Russian location since 2020. Their Scandinavian-derived name meaning "sin" channels Nordic transgression into compositions of anonymous atmospheric darkness.

Synode channels black metal from the Aquitaine corridor between Bordeaux and Hendaye, active since 2012. Their name, meaning 'synod,' borrows religious assembly terminology to frame black metal steeped in anti-clerical and occult themes.