Spectre

On of the very worst of the Ethereal Undead, the Spectre is a malevolent spirit that takes joy, and energy, from harrassing the living. Unlike most other of the Ethereal Undead, the Spectre can be temporarily disrupted with non-magical weapons. But take heart, after you leave, it will take a few moments to savor a piece of your spirit and to re-incorporate itself. It will then lay in wait, sometimes for centuries, for a new victim to cross its path.