The gemstone that Ertos mentioned was right beneath the Grand Temple. The old priests of the day apparently attached great importance to the object. They had drilled a shaft of a few hundred meters deep in the bone foundation below the city. They built a secret chamber and sealed it with molten metal. It was because of this ridiculous storage method that the gemstone escaped the destruction caused by the battle between Hao Ren and the Malevolence, as well as the rebellion that occurred in the Grand Temple thousands of years ago.
However, a shaft of a few hundred meters and a layer of metal were not a much a problem for Hao Ren's autonomous robots. The robots bored a sloping passage next to the high ground and extracted the gemstone.
Just as Hao Ren and Vivian had expected, the gemstone was a blood crystal.
