Warning: you won't understand a word of their lyrics. Not only because their death grunt is on point, but also because they use a local dialect from the West-Flemish region. Named after a fabled water spirit that features heavily in Flemish folklore, Kludde is one of the most original and fearsome extreme metal bands in the land, fusing slow sludge with black metal atmospherics to terrifying effect. For proof, just check their recent album 'In de kwelm' (and no, we don't know what that means either).