An ash wraith, sometimes referred as dust wraith, is a powerful version of a shade, a spirit that has entered the physical world but does not possess a physical body. The spirit has formed a quasi-material body for itself out of ashes (usually the ashes of burnt corpses but not necessarily). This allows it to interact with and affect the physical world, but the ash wraith is not dependent on the ashes to survive. If wounded, it can disperse at will and reform later. Such wraiths occasionally use other materials to form their physical bodies such as bones, mold, and even blood.