Wearing this cloth around your eyes commands the spirit of a tortured foe. You see as the ghost sees, in blackness unnatural and absolute. Nothing can blind you. You need no light of any kind. The ghost walks directly behind you, bound, for twelve hours. After this time, or when you remove the fold of cloth—whichever comes first—the ghost must feed on the soul of a named intelligence. To do this, you must kill a living humanoid being and feed it to the ghost. Fail to do so, and the ghost attacks you.

The ghost has stats as a Keres, but will not act except to observe and to feed. It is naturally invisible and incorporeal. If attacked by creatures able to see such, it will defend itself.