The mad philosopher's stone is a translucent red object, generally in the form of either a crystal or a fluid with a very high surface tension. It contains the souls of many people, put there through the use of unpleasant magics. A mad philosopher's stone contains some number of soul points, which can be spent to provide various benefits, so long as you are touching it: When a mad philosopher's stone runs out of soul points, it breaks and can no longer be used. Strong conjuration; CL 10th; form philosopher's stone; Cost to craft: see form philosopher's stone ; Price Cost::50 gp per soul point.