One of this year’s great fall albums has arrived. Emma Ruth Rundle, the Louisville-based musician who specializes in a heavy and gothic form of singer-songwriter music, has teamed up with Thou, the Louisiana sludge-metal titans, to make a full-length collaborative LP. The two artists make for a stunning combination, and their new album May Our Chambers Be Full might be the best thing that either one has ever released.

Together, Rundle and Thou have found common ground in a dark, flickering, windswept take on grunge, transforming it into the heaviest version of ’90s alterna-rock that you could possibly conjure. Rundle’s chants and melodies have an icy, ritualistic quality. Thou’s doomy trudge gains a certain beauty. Together, they have made something gorgeously ugly. It’s a truly monstrous album, a soothing sort of thunder.

We’ve already posted the early tracks “Ancestral Recall” and “The Valley,” both of which are huge and both of which should give you some idea what to expect. But it’s one thing to hear individual songs, even great ones. It’s another to behold what Rundle and Thou can do when they stretch out to album length. May Our Chambers Be Full is a truly special album, and you can hear it below.

May Our Chambers Be Full is out now on Sacred Bones.