Crystals on pillars
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Overview
There is a ruin with a treasure chest sealed behind a stone door. This door is locked by multiple light blue crystals placed on top of nearby pillars. To open it, you need to break all the crystals. You can easily destroy them by throwing something at them. The number of crystals you need to break matches the number of symbols on the door.
Crystal
This is a crystal. In other areas, there are many cases where you won’t be able to retrieve what you throw, so it’s best to use something you don’t need, like a stone or hay.