Sunstar

From Wookieepedia, the Star Wars wiki.

The yellow Sunstar and purple Shadowstone combined to form the Sunstar-Shadowstone (also known simply as the Sunstar).

The Sunstar was an artifact of immense power located on the forest moon of Endor. The Sunstar was the counterpart to the Shadowstone. It was the focus of a series of conflicts between Logray, the Ewok shaman of Bright Tree Village, and Morag the Tulgah witch. Logray eventually gained control of both the Sunstar and the Shadowstone, combining them to form the Sunstar-Shadowstone (although it was thereafter often referred to as simply the Sunstar).

Later, Dr. Raygar attempted to steal it and use it to gain control of the Galactic Empire, but this plan was thwarted by Wicket W. Warrick, and several other Ewoks.