Italian avant-garde metal act SYK formed in 2013 when guitarist Stefano Ferrian and Federico De Bernardi di Valserra recruited vocalist Dalila Kayros following the dissolution of their previous project. Their debut Atoma (2014) attracted Philip H. Anselmo, who signed them to Housecore Records and produced their second album I-Optikon (2016); subsequent releases Pyramiden (2022) and eartHFlesh, on Season of Mist, expanded the band's eclectic fusion of djent, progressive metal, death metal, and extreme experimentation. Kayros' harsh female vocals are central to the band's identity.

Tomaszów Mazowiecki's Symbolical deliver death metal from the central Polish textile town since 2015. Their representational name and industrial-town origins channel the symbols of mortality into compositions of focused extremity.

Tarnowskie Góry's Symetgal deliver death metal from the Upper Silesian town since 2019. Their enigmatic name and former silver-mining origins channel subterranean mystery into compositions of focused aggression.

Budapest's Symmetry of the Void blend death and melodic death metal with a name that finds order in emptiness since 2016. Their philosophical approach yields compositions that balance structural precision with crushing weight.

Symposion deal in death metal from Copenhagen, their name (from the Greek symposium, a drinking party with philosophical discussion) adding intellectual weight to their extreme output. Active since 2013, they bring philosophical brutality to the Danish death metal landscape.

Sundsvall's Syn:drom deliver death metal from the Norrland coastal city since 2010. Their colon-punctuated syndrome name channels the clinical classification of pathological patterns into over a decade of compositions from northern Sweden.

Stary Oskol's Synalgia pair doom and death metal from the Belgorod region's iron-ore city since 2019. Their medical name meaning "referred pain" channels the phenomenon of mislocated suffering into compositions of crushing heaviness from Russia's steel belt.

Bosany's Synapse Failure deliver death metal from the Nitra-region village since 2019. Their neurological-malfunction name channels the breakdown of nervous-system communication into compositions of clinical extremity.

Synchronic channel progressive death/thrash metal from Frankfurt, building technically demanding compositions that balance cerebral ambition with aggressive energy. Active since 2008, they represent the sophisticated end of the Hessian extreme metal spectrum.