PREVIEW
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In the middle of the cave, a piece of fluorite the size of a millstone is inlaid on the top wall, reflecting the entire huge cave like daylight.
Under the soft light, if you look carefully, you can also find that the huge cave here is man-made, and it is by no means the magic of heaven and earth.
Because, on the top of the rock wall, there are a series of man-made traces such as burnt black, marks of swords... and so on.
But to create such a vast cave is obvi ...
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