Some of the sigils correspond to glass cases containing various items, which sink into the ground when completed. However, since activating a few of them, I haven't noticed any sort of change. What are they for?
What’s the point of the glass cases
the-talos-principle
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Best Answer
After activating one, you gain the ability to use that item in puzzles. Not all items are in all puzzles, though - the signboard next to the puzzle-entrance tells you which items need to be unlocked to do that puzzle.