With a decade between releases, Vildhjarta remain as inscrutable and as close to anonymity as a band can be. Their down-tuned, staccato riffs and pulverizing grooves are the sound of music stripped to its essence. Yet, the Swedish collective’s long-awaited album, “Måsstaden Under Vatten”, is far more than a recitation of djent values. Clocking in at 80 minutes, it thematically picks up where the dark Swedish fable of 2011’s “Måsstaden” left off and delivers on the promise that record hinted at. “Art happens when art happens,” states Vildhjarta.