Descending from Chicago’s northern reaches, instrumental mutants Lorus are back with their new record, a wild maelstrom called Byzantine. Pillaging their way through rock, sludge, prog and more, the band pushes the eclecticism of ’07s Deluge to extremes. Lorus’ core of guitarist Dylan Burr, bassist Chris Brown and keyboardist Alan Lawrence have been pounding away for four years, growing gutsier with each show. Lorus are rock ‘n’ roll nomads, only at home when they’re on the move. Across Byzantine’s 11 tracks, they are always shifting, embracing complexity without sacrificing their visceral punch.