Crystal of Ix
From Ardrana
A Crystal of Ix is a magical gemstone that is typically found only deep in the Cardillic Desert. Their particular power is the ability to drain energy from any other object -- or, if its master desires, person. They are especially prized because they can be grown from a single fragment, however they are quite fragile and thus smaller crystals are easily destroyed.
Note: The Crystal of Ix originally appeared in the Aladdin TV show. All references are meant only as context for the fictional gaming world of Ardrana.