“The Withering” (*1/2 out of four) was a sodden horror psychodrama about a woman (Amelia Mahrie) who discovers an amulet that restores her eternal youth by gradually draining away the years of life from everyone around her (Gareth Tidball, Debra J. Onsager, and others) but soon finds that this is corrupting her soul and threatening her sanity. Intriguing storyline goes absolutely nowhere in this overlong and overly grim feature. By the end, it devolves into a morass of supernatural hokum ripped off from “The Exorcist.”