Ghost-in-the-Box

The Ghost-in-the-Box is an item included in the Halloween 2005 update. It is traded by the Necrid Horsemen Halloween Collectors in each of the major cities (except The Amnoon Oasis).

It causes a small ghost, something like a miniature Damned Cleric to appear in front of you with a slightly startling noise and the word "Boo!" above its head, stay for a brief time, then disappear in a puff of smoke with another yell. Ghost-in-the-Box has no other effects.

It is unknown how long this will be included in the game. Most likely it will be removed after Halloween. This may make hoarding it now and selling it later quite profitable.