The 长方形箱子 is an Important Item in 异度神剑X. It is obtained in 白树大陆 during the 普通任务 墓碑的教导.
When the chest is opened, it is found to contain a book with the riddles from the three 墓碑 markers examined during the mission and their solution:
- "Our 秘宝 is bane to any wall,
able to harm or heal one and all." - "Our 秘宝 is succor to all of the poor,
a flame that incinerates all evermore." - "Our 秘宝 alone is fit to awaken
the way to a world that is long forsaken." - "That 秘宝 is love—the light that shines our way even through the darkest of struggles. I record our love here, that we may never forget it. That we may use it as a beacon to guide us as we wander the vastness of space."
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