Wraiths are thought to be powerful spirits, which are of such power as to enter the world of the living, even without a rift. Often these are spirits of great malevolence, slighted by the realm of the living and obsessed with need for vengeance. Even so, being long dead, they may only enter the life realm partially and, as such, are ethereal in nature. They can not be harmed by most forms of attack, and feed upon the living to gain strength in the physical realm. They leech living souls, drawing in their life energies to continue their murderous work upon the world. Wraiths are susceptible to a Cleric's power to Turn Undead, or to magic based attacks.