The Mysterious Relic Key

"I accidentally entered this relic once. It should be a place left behind by an alchemist, filled with rare medicinal herbs. While exploring the notes left behind by the alchemist, I found records of cases similar to Eoryun's condition. But before I could read further, I blacked out. When I woke up, I was lying on the outskirts of the city with two stones beside me. One had already lost its glow, and after studying it, I realized it was the one I had used to enter the relic. As for the other one, I suspect it's the second relic key."

Eoryun asked in confusion, "Then, Uncle, why didn't you try going back inside?"