Mysterika is a progressive metal band from Castilla-La Mancha, Spain, blending heavy metal foundations with complex, extended song structures. Their 2012 release features four tracks ranging from five to seven minutes, showcasing instrumental compositions that sit at the intersection of metal and progressive rock.

Mysterion is a heavy/speed metal act from Prague, active since 2018. The band delivers classic-style metal from the Czech capital with the mysterious edge their name implies.

Mysterizer is a melodic heavy metal band from Oulu, Finland's self-proclaimed heavy metal capital, blending classic metal with their own melodic touch. Signed to Rockshots Records, the band has released albums including 'Invisible Enemy' and 'The Holy War 1095,' drawing from NWOBHM and European power metal traditions while carving out a distinctly Finnish identity.

Mystery Blue is a legendary French heavy metal institution from Strasbourg, founded in 1982 by guitarist Frenzy Philippon. The band toured with Motörhead, Def Leppard, and Saxon in the 1980s, and after reforming in 1996 with vocalist Nathalie Geyer, they have continued to release albums — now nine deep — cementing their place as one of France's most enduring metal acts.

Mythra is a NWOBHM-inspired heavy metal band from South Shields, England, formed in 2023. They channel the classic spirit of the New Wave of British Heavy Metal from Tyneside.

Mythrall is a heavy and power metal band from Seville, Spain, formed in 2025. They forge triumphant power metal driven by soaring melodies and epic compositions.

Mythrill is a heavy metal act from Budapest, formed in 2025. The band draws from Tolkien mythology and the European heavy metal tradition, delivering epic, fantastical compositions.

MÉS is a heavy, thrash, and groove metal act from the Haute-Marne department in eastern France, active since 2018. The band blends multiple metal styles into a hybrid approach that draws equally from classic thrash and modern groove metal.

Mástil is a heavy metal and hard rock act from Madrid, blending classic metal riffing with blues-inflected hard rock grooves. Active since 2017, the band occupies the intersection of traditional metal and rock that has long been a staple of the Spanish capital's live circuit.