Ordo Ad Chao

Released in 2007, Ordo Ad Chao marked the return of legendary vocalist Attila Csihar to Mayhem for the first time since their 1994 debut. It is a pivotal work that saw the band pivot away from the technical, clinical sound of Chimera toward a raw, 'necro' aesthetic. Drummer Hellhammer famously noted that the tracks were left largely un-equalized to preserve a sense of primordial filth. The album's composition is highly experimental, featuring the nearly ten-minute 'Illuminate Eliminate,' which showcases the band's shift toward long-form, atmospheric dissonance. It won the Spellemann award for best metal album, signaling its critical success despite its uncompromisingly difficult sound. This record is also notable as the final contribution from guitarist Blasphemer, whose complex, dissonant riffing style defined the band's middle era. It remains one of the most polarizing and influential albums in the avant-garde black metal canon.