Black Skies aren’t reinventing the wheel but damn if they don’t do a fine job of dragging it through the blessed swamp of heavy, heavy rock. The North Carolina trio pays homage to early Sabbath with dense metal riffs that proceed like a snail on Quaaludes. Their latest release, the EP/limited-run 12-inch Hexagon, achieves a distinct sound thanks largely to Kevin Clark’s distorted monster vocals that crack and splatter across his bandmates’ churning rhythm section. It’s good, dark, ribcage-rattling music for zoning out and, perhaps, anger management therapy. Check it live tonight. Burts Tiki Lounge, 726 S. State, 9 p.m.