Ancient Ruins Key

- Description: A key made from fragments of an Ancient Ruins tower. Find a place in the Ancient Ruins where it can be used. (※ Use this item to find the location.) ※ Use the item at the designated location to summon the Defender of the Ancient Holy Shrine. ※ The summoned Defender of the Ancient Holy Shrine will disappear after 10 min

- Additional use requirements are not yet decoded; this is not a complete eligibility check.