Crystal Ball

Regular

Crystal Ball: A magic-user or elf may use this coveted magic item to see distant places, people, or objects. Anything may be viewed for up to 1 turn, 3 times per day. The user of the crystal ball is unable to communicate with those he observers, and he is unable to affect them magically or otherwise through the crystal ball.

Clairaudience

Crystal Ball with Clairaudience: This kind of crystal ball has all of the properties of the ordinary one, but also grants the observer the ability to hear any noise or conversation at the location observed