The Esper Saga
The Heart of the Mountain
A bright green gem
The Heart of the Mountain is a bright green gem, possessing mystical unknown powers.
The Heart of the Mountain was created by the Espers, who imbued it with Magi. It was placed under the guardianship of Lurra, the Guardian under the Warp Zone in The Land of Fuuka, until the creature was defeated and cowed by Gehenna and his allies. Fearing that the Emperor would soon defeat the guardian, Gehenna took care of the Heart of the Mountain and gave it to Ramuh, who currently carries it.