The Cintamani Stone

Appearance
Able to fit in the palm of one's hand, the stone is known to glow when used.

Ability
The Cintamani Stone has the ability to grant any wish. But if the wording isn't precise enough, it might give you more problems then you had originally.

Uses
Cozen has been known to use the stone to control people. But if someone's will is strong enough, they are able to resist complete control.

Medea used the stone to get Gina and Arcadia back from Cozen's clutches.