Herethis mine

Herethis mines is a developed platinum vein about 120 miles east of Deastok, and just on the outskirts of the Cyrengreen Forest.

Description
The location of Herethis mines played a role during the Calamity and is named after one of the heroes who fell during these times. The entry point of the mines is a pitch black sinkhole in the large rocky hills of the Truscan Vale, about 150-200 feet in diameter and around a quarter-mile deep. There are two standing stone towers set up around the pit, and the remnants of another pair of towers, as well as other mining equipment have fallen in after the quake that caused the expansion of the sinkhole.

The sinkhole tunnel descends into a peanut-shaped chamber, connected to a small tunnel collapsed in 812 PD. In the center there is an ancient stone platform with a square recess with slightly less than foot-long sides. The platform is covered by a number of small carvings transcribed in Celestial speaking of gestation, a seed, and protection by a guardian for the ages to come: Symphior.

History
The platinum source was first discovered by the Julous Dominion, which pushed the neighboring Dwendalian Empire to break their nonaggression pact, declaring the Marrow War in 544 PD. Upon conquering the Dominion, the empire incorporated the Herethis mines in the imperial territory. The empire expanded the mines and increased production, but were challenged by the nearby ankheg population of the Cyrengreen Forest. Over the past fifty years before 835 PD, the Myriad has slowly infiltrated the operations of the mines and have embezzled some of the platinum to fund other Myriad activities.

At some point long before 812 PD, Symphior found a home among the halls of the mine to grow into adult planetar and eventually protect the land. However its development was interrupted by the corruption of the land, which made it deformed. Shortly before Misuthar 812 PD, it was awakened early by the Myriad's drilling, breaking into loud cry that shook the ground, which caused the sinkhole, attracted ankhegs, and sabotaged the mining. The Myriad than sent scouts to learn more of the source of this erosion, but none returned.

In Misuthar 812 PD, the Myriad hired Vox Machina to deal with the dangers of the mines and in exchange the organization promised to leave some Darrington property with their family, while demanding the remaining majority to pay off the debt. After successfully defeating Symphior, Pike cast Earthquake to collapse the mine entrance and cast Fire Storm to kill the rest of ankhegs that managed to reach the surface. The party returned to report of the success to the leader of Deastok cell of the Myriad. When this was confirmed via Scrying, he handed over the deed to the Darrington Estate and some small holdings, while taking the rest of the family's property.