Along with fellow Georgian metal mavericks Mastodon and Baroness, Savannah quintet Kylesa has taken a place at the vanguard of heavy music over the past decade. Anchored by the guitar/vocal tandem of Phillip Cope and Laura Pleasants, Kylesa forges an ever-evolving brand of psychedelic sludge that has made quantum leaps with each new album. 2006's Time Will Fuse Its Worth first introduced a dynamic two-drummer line-up, while follow-up efforts Static Tensions and Spiral Shadow further refined the band's expansive sonic vistas and the counterpoint between Cope's authoritative bark and Pleasants' more melodic singing. On the group's dazzling new Ultraviolet, Kylesa mixes blissful shoegaze and earworm hooks with its trademark riffs to stunning effect. Canadian doomsayers Blood Ceremony, Brooklyn's acclaimed psych merchants White Hills, and prog-tinged experimentalists Lazer/Wulf fill out an epic four-band bill this Saturday at Slim's.