A faceted piece of quartz crystal
This is a faceted piece of quartz crystal a little larger than a mans finger. The workmanship is average and the material is ordinary quartz. On occasion it will glow blue, when it does you have noticed everyone in the area seems to get headaches.
This strange crystal was found in the Argonne Forest in the care of a rural priest. Some papers found with it say it was brought back by a knight from the First Crusade. The knight claimed it was magical, that it could detect the presence of evil spirits and would glow a sickly blue color when they were near. The crystal has remained safely in the keeping of the priests of this remote church for centuries a forgotten artifact until the horror of the First World War brought forth the evil spirits from whatever foul pit they waited in to once again stalk the forest. The crystal was given to Sgt Patric O’Hara by the doomed priest along with several small books of lore that held the secret to foil the evil, maybe for good.