Editing Notes from Freedom City setting for Man'O War (section)

===THE MOONSTONE===
Moonstone, the: An alien crystal created or discovered by the Preservers and used for millennia as a power-source in Farside City until it was usurped by Lady Lunar. The Moonstone enhances psionic powers and serves as a near-limitless source of extradimensional energy. 
The Moonstone is a mysterious alien artifact, created or discovered by the Preservers and left behind in Farside City when they departed Earth’s solar system. It is a fist-sized, faceted piece of translucent crystal with a pearly luster that glows softly from inside. The Moonstone is a potentially limitless power-source, and has provided most of the energy needs of Farside City for thousands of years.
The Moonstone is also a powerful psionic amplifier. Its energy can boost the abilities of a psychic through physical contact, and even grant access to abilities they don’t even normally have. The mentats of Farside occasionally used the Moonstone to enhance their powers, and held the crystal in trust for the entire community. When Lady Lunar overthrew the royal family, she seized the Moonstone’s power for herself. The Atom Family returned it to the custody of the Farsiders when they in turn deposed Lady Lunar.  There appears to be some sort of psychic link between the Moonstone and Chase Atom. Chase has been able to override another’s control of the stone in the past with great mental effort. It may be because he is descended from one of the last survivors of the royal family, because of his unique human/Farsider heritage, his unusually strong psionic powers, or some combination thereof.
The Moonstone’s powers, and any enhancements it grants, are left as a plot device for the GM to decide. It’s generally not a device the heroes should have easy access to or use of, since Farside City depends on its energy and is not overly inclined to part with it. You can use the Moonstone as a means to enhance the powers of villains like Lady Lunar to make them more formidable threats for your heroes. It could also be part of a cosmic plot involving other “Celestial Stones” (see the Star Knights section of this chapter for more).