Heart of the Earth

Heart of the Earth is a rare gemstone and a mined resource. It is required to construct the Dragon's Lair room, a couple of items of Furniture, and as upkeep for the yet to be implemented dragons. Stored Within: Storage Room

Related Technology

 * Elements From The Earth's Core - Enables Mining
 * Jeweler's Efficiency - +25% Mining Rate Advanced Jeweler's Efficiency - +25% Mining Rate