Xalvorn is a one-man black metal project from Leiria, Portugal, started in 2025 by a 16-year-old musician immersed in misanthropy and the occult. Despite the creator's young age, the project already has several releases including collaborations with Lord Pedrial, channeling raw black metal described as "blood-soaked riffs and war-torn visions."

Xanathar is a black/doom metal project from Italy, formed in 2021 with releases including "Thunders over Waterdeep" and "Gold, Black and Crimson." Their fantasy-themed album titles and dark atmospheric compositions fuse the menace of black metal with the crushing weight of doom, channeling imagery drawn from epic and occult sources.

Xanathos is a blackened death metal band from Zaandam, Netherlands, formed in 2021. They deliver ferocious blackened death metal that fuses the melodic aggression of death metal with the atmospheric intensity of black metal, emerging from the Netherlands' prolific extreme metal scene.

Xandelyer is a black metal project from Hanover, Germany, formed in 2009. The project channels atmospheric and raw black metal energy, contributing to Germany's extensive and varied black metal underground.

Xandr is a black metal project from Worcestershire, England, formed in 2020. The project releases atmospheric black metal through releases like "Trauma" and "Shaded," channeling darkness and introspection from the English countryside.

Xantotol is a black metal project from Kutno, Poland, originally formed in 2013 and part of Poland's extensive black metal underground. They channel raw, uncompromising black metal in the Eastern European tradition, contributing to Poland's reputation as one of the continent's strongest scenes for extreme metal.

Xaos Oblivion is a solo black/doom metal and ambient project from Walbrzych in Lower Silesia, Poland, active since 2004. Created by a vocalist also involved in Demonic Slaughter and Blaze Of Perdition, the project blends dark atmospheric metal with ambient soundscapes on releases like the remastered compilation "Rituals Of Ancient Wisdom."

Xaoz is a black/death metal band from Legnica, Poland, formed in 2017. They fuse the raw fury of black metal with the crushing heaviness of death metal, drawing from Poland's exceptionally deep well of extreme metal talent and tradition.

Xarzebaal is a raw black metal project from Bydgoszcz, Poland, formed in 2018. With a minimalist approach to both their music and presentation, they have released three self-titled numbered albums (I, II, III), channeling unfiltered aggression through stripped-down raw black metal.