Saint Petersburg's Siege Golem practice raw black metal from the cultural capital since 2021. Their name of animated-stone warfare channels the constructedness of magical defenders into lo-fi compositions.

Siege of Power is an international death/thrash metal supergroup formed in the Netherlands in 2017, featuring Chris Reifert (Autopsy) on vocals, Paul Baayens (Asphyx) on guitar, Theo van Eekelen (ex-Hail of Bullets) on bass, and Bob Bagchus (ex-Asphyx) on drums. The band's debut album Warning Blast, released in 2018 on Metal Blade Records, delivered twenty tracks of raw, uncompromising death-thrash with doom and punk underpinnings. Their follow-up This Is Tomorrow (2023) continued the band's relentless approach, drawing on the collective pedigree of its members to produce some of the most authoritative extreme metal of the era.

Siegehammer forge black/death metal from Tarragona on the Catalan coast, combining the atmospheric darkness of black metal with death metal's crushing weight. Formed in 2023, they bring siege-warfare intensity to the Mediterranean extreme scene.

Formed in Innsbruck, Austria in 1998, Siegfried built their sound around the Nibelung saga, crafting blackened symphonic power metal with lyrics drawn directly from Germanic heroic legend. Their debut album Drachenherz arrived in 2001 on Napalm Records, followed by Eisenwinter in 2003. The band's third full-length, Nibelung (2009), was widely regarded as their strongest work, refining the orchestral and narrative ambitions that define the project. Songwriter Ortwin composes all of the music while lyricist Bruder Cle translates the mythological source material into metal form.

Sielkanker emerged in 2025 as one of France's newest blackened/symphonic deathcore projects, pairing orchestral grandeur with crushing breakdowns. Their Afrikaans-derived name, meaning 'soul cancer,' signals a thematic preoccupation with psychological torment.

Sieluhaaska (Finnish for "Soul Waste") practice black metal from the Finnish underground, channeling spiritual desolation through raw compositions. Formed in 2021, they bring wasted-soul intensity to the Finnish black metal scene.

Bratislava's Sighisoara pair gothic and doom metal from the Slovak capital since 2013. Named for the Transylvanian city where Vlad Dracula was born, over a decade of channeling vampiric heritage into darkly atmospheric compositions from the Danube.

Verona's Sight merge black metal, death metal, and experimental elements since 2018. Their minimalist name belies an ambitious approach that refuses to be confined within traditional genre boundaries.

Calcinelli's Sight of Eternity blend death and melodic death metal from the Marche region since 2024. Their name's infinite scope mirrors compositional ambitions that balance brutality with sweeping melody.