The first treasure chest is located in a mine hole between groundwater and unknown ruins. The mine was blocked by a black mud spout. Players need to upgrade the lumen stone first, and then use the lumen stone to disperse the black mud spout. Then the mine opens, and there will be three kinds of rewards. Among them, there are 9 dark green spheres, and you must defeat 9 black snake knights to collect them. After the collection is completed, you can go back to the upside-down ruins of Canria, open the organ, and get achievements and 30 original stones. To find the positions of nine black snake knights, players only need to use the collection in the upper right corner of the game to track the black snake crowd, and they can easily find the positions.