Here’s a litmus test to determine whether or not you’ll be a fan of Black Bone Child. Does the Delta blues yowl of Jimmy Page’s guitar on “When the Levee Breaks” rock your soul? If the answer’s yes, the music of Black Bone Child will likely smash it to smithereens. The duo is made up of Donny James and Kenneth M., a slide guitarist and bassist from Austin, Texas. Their songcraft is simple, but resounding: shuddering guitar riffs, guttural bass lines and distorted vocals that iterate unrelentingly. The banshee screech of guitar on “Make Me Bleed” is heart-stopping by itself, and combined with gritty, circulating rhythms creates an almost intimidating display of blues mojo. “Light Up the Sky” lumbers and sways, bearing down with the crunching, yowling guitars. Black Bone Child has stumbled upon something potent and primal. In the state where everything’s bigger, their music is a powerful beast.