Wiki Targeted (Games)
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This ancient key has been weathered by the years, save for the single flawless ruby that gleams softly from its resting place in the grip.
Examining the Treasure Coffer in the Tenshodo HQ in Lower Jeuno with this key item in your possession will allow you to exchange it for certain items (see below). Choose "Key from A Crystalline Prophecy" and then "Crimson Key". Any equipment received from this has a possibility of being Augmented. It should also be noted that you cannot acquire this key item without the expansion.