Dungeons & Dragons: Dragonshard

In the ancient war of Eberron, the dragon Siberys was destroyed by her brother Khyber, and her remains formed a ring encircling the world. The largest fragment — the Heart of Siberys — crashed into the continent of Xen'drik, creating a storm-swept mountain range and giving rise to the Lizardfolk who have guarded it ever since. Now three factions converge on the Heart to claim its power: the Order of the Flame, seeking to use it for good; the Umbragen dark elves, hoping to drain it and unlock their sunken city's secrets; and the Lizardfolk, who intend to keep protecting what is theirs.