Spectre

Creature Type: Undead
Environment: Any
Attack: Incorporeal bad touching
Special Qualities: Incorporeal, energy drain
Organization: Solitary or ghost gang (2-4)

Among the most powerful undead, yet still common enough for you to be likely to encounter it, the spectre is tougher and more dangerous than the typical wraith. It must be evaluated for its potent offensive ability and its dangerous (and annoying) ability to phase in and out of our plane. This will cause the creature to vanish occasionally, reappearing a few seconds later, often very close to you or one of your companions. Be alert, and keep moving when the creature phases out. It's the best way to make yourself less vulnerable to the creature phasing in behind you.