As if exhumed from a tenebrous archive of unholy secrets not meant for a layperson’s eyes, German writer-director Tilman Singer’s succinctly horrifying first-feature, “Luz,” chronicles the passage of a demonic entity across multiple bodies in search of its legitimate host. A dynamically engineered hypnosis session, conducted in a police station echoing Lars von Trier’s “Dogville,” brings him to Chilean taxi …
