This is a unique monster that can be found in the first maze level of Wizardry: Proving Grounds of the Mad Overlord. The ghost appear when the party searches the gem encrusted statue of a hooded man at 13E/5N. Unidentified, the monster appears as an "unseen entity". It doesn't do much damage, but is nonetheless relatively hard to kill for a party of rookies. The point of this creature is to grind up your stats so that you can face the next floors below. The amount of experience he gives is much higher than any enemy you face in the early levels.