Thrones

Ufomammut are an Italian power trio formed in 1999 in Tortona, dealing in a signature strain of psychedelic sludge that spans doom, stoner, sludge and drone metal. Their music favors lengthy songs built on repeated heavy riffs, droning vocals and a heavy use of synths and sound effects, staged live with synchronized psychedelic visuals by founders Poia and Urlo's Malleus art collective. Their most recent studio albums — including Fenice (2022) and Hidden (2024) — appear on Neurosis's Neurot Recordings.

Khanate was an American drone/extreme doom supergroup formed in New York in 2000 by guitarist Stephen O'Malley and bassist James Plotkin, with vocalist Alan Dubin and drummer Tim Wyskida. Their glacial music paired extremely slow tempos and harsh layers of feedback with Dubin's torturous shrieking, debuting with a self-titled album on Southern Lord Records in 2001. The band split in 2006 before a surprise return with the album To Be Cruel, released via Sacred Bones Records in 2023.

Boris's early drone/doom era built monolithic, amplifier-worshipping slabs of sludge, doom and drone metal, frequently structured as single extended long-form pieces rather than conventional songs. The 1996 debut Absolutego is a 65-minute track of oozing, slow-motion, Melvins-inspired drone rock/metal, while Flood (2000) unfolds as one roughly 70-minute title track broken into four movements. Across Amplifier Worship (1998) and Boris at Last -Feedbacker- (2003) the trio pushed feedback, distortion and glacial tempos to the foreground, a sound whose kinship with Sunn O))) later yielded their joint album Altar.

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Opium Warlords is the solo-turned-trio outlet of Sami Albert Hynninen (Albert Witchfinder of Reverend Bizarre), stretching doom metal into extended drone-riff meditations with minimal percussion. Since 2010 he has been joined by drummer Erkki Virta and keyboardist Laura Länsimäki, though the project remains built around Hynninen's distorted bass and bleak conceptual framing. Six albums deep on Svart Records, the band trades hooks for duration, dissolving riffs into noise and silence.

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Burning Witch was an American doom/sludge metal band formed on Capitol Hill in Seattle in early 1995 from the ashes of the doom/death band Thorr's Hammer, active until 1998. Known for extremely slow tempos, dense feedback and Edgy 59's alternately mournful and tortured vocals, the group is best remembered as a formative pre-Sunn O))) project for guitarist Stephen O'Malley. Their EP recordings were gathered on the compilation Crippled Lucifer, released in 1998 on Southern Lord Records, the label O'Malley co-founded with fellow Seattle musician Greg Anderson.

Author & Punisher is the one-man industrial/drone/doom-metal project of San Diego mechanical engineer Tristan Shone, who performs on custom-designed and hand-fabricated instruments he calls 'Drone Machines' and 'Dub Machines'. Handpicked by Tool to support their 2020 tour, Shone returned the favor on his 2022 Relapse album Krüller: Tool's Danny Carey drums on 'Misery' and bassist Justin Chancellor plays on 'Centurion'. The result pairs monolithic, machine-driven weight with dub space and industrial menace.

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Black Mayonnaise is the long-running one-man bedroom project of Mike Duncan from Akron, Ohio, active since August 1991. It blends heavily detuned, distorted doom/sludge guitar with drum-machine programming, tape loops and cut-up sonic manipulation into a lo-fi, ambient/psych-drone-inflected sound. Cited influences include old Godflesh, old Carcass, Butthole Surfers and Big Black; notable releases include TTSSATTSR (2004) and the retrospective compilation When You Get Caught Between the Moon and Boston Harbor (2011). (Verified spelling: the RYM scout note had a typo, 'Black Mayonaise' — the real band spells it 'Black Mayonnaise'.)

Beneath the Sod is the solo funeral/industrial doom project of Irish musician Ray Keenaghan (Wreck of the Hesperus), formed 2017. Releases include Circling the Drain (2017, Fort Evil Fruit), the split cassette Transmorphic Eye (2018, with Crypticum), and a self-titled 2021 EP on Cursed Monk Records described as harsh, synth-laced industrial doom metal with guest vocals from Richard Carson.

German experimental/noise act (Mainz) built around destructive recording techniques rather than conventional songwriting — their Radiant Eulogy series deliberately degrades master tapes (sun exposure, physical decay) to bury heavy doom riffs under crackling, collapsing signal. Prolific (37+ Bandcamp releases since 2013) across noise, post-metal, drone, doom, and post-rock with electronic/tape elements. Sits closer to power-electronics/drone art-noise than conventional metal songcraft.

Persistence in Mourning is the Oklahoma City-based solo funeral doom project of Andy Lippoldt, active since 2006, described as sitting between funeral doom, death industrial, power electronics and death metal.