The Hearts of the World (artifacts)

The Hearts of the World are a collection of eight magical gemstones embewed with the power of natural environments. As artifacts, the Hearts are more than just magical items - they have personalities and goals, which are often thematicly based on their associated environment. The Hearts of the World include the Hearts of the Sky, the Ocean, the Forest, Fire, Light, Darkness, Dust and Stone.

History
At one point in history, five gems of the Hearts of the World were gathered by five heroes to defeat Yuan, the Dark Lord. The gems were then given to the discendants of the heroes to safeguard them. However, the weakness of the Heart's guardians has caused the gems to "move on," and they have thereby been largely lost.

Provences of Influence
In addition to having powers relating to natural environments, each gem also contains certain governance over other concepts as well.