Crystals were minerals capable of replacing magic nuclei as means for storing elemental energies, but crystals were hardly found on crust veins. They did not emanate radiation like magic nuclei, rendering detection impossible. The crystal mines Saleen found in the Demon City were not pure, and refinement was needed before the end products could be put to use.
True crystals were something that could be set on magic arrays as soon as they were cut or be used directly by mages for training.
Most of those crystals were exhausted during the Second Dynasty, and not even areas near the ocean were found to house much deposits. What Nailisi saw right there however, was a red crystal cave with a diameter of at least three miles.
Nailisi shuddered. The great snake's body still resided within that cave. The temperature of the lava in the cave was very high, yet the liquid was clear as water.
