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From: Unpredictable Treasures
A board of knotted oak bearing four green stones imprisoning twisted bones. A blue glint at the centre.
Unlocked with Uncovering an Unpredictable Treasure: 20–37
Some deeper intrigue
The lettering on the board is almost erased by time, but you can make out 'ALLIES... DEVOURING....ROSE'. If your interpretation is to be trusted.