Meandering along the canyons and valleys of southeastern Brazil comes a sublime reverberation, an enchanting tribal rhythm as intoxicating as it is menacing. Deep in the heart of São Thomé das Letras, a duo of seismal proportions has emerged from the storm. Swirling layers of drone and guitar trickery blanket a hypnotic mix of psychedelic flavor, from ritualistic drum chants to vocals submerged in noise and feedback. It’s the sound of the lone hitchhiker on Route 50 with a strange suitcase, it’s the music you hear underneath the floor of the weird hotel downtown. What’s happening down there? It has to be a human sacrifice.