C569 Evil Spirit
The Heart of Earthly Stone and the Heart of Darkness were different. It was just an earthen-yellow stone.
Those who did not have eyes would think of it as a shiny yellow stone head, while those who had eyes would be able to tell from the stone patterns and the power emitted, that it was a Heart of Earthly Stone.
These Heart of Earthly Stone were basically all embedded in ancient soil, mountains