Memoria Stone cannot be used for Awakening, Ascension, or Converting .
If you have a Memoria Stone locked, the Memoria Stone will be grayed out when you attempt to improve it and it will not be available for Awakening, Ascension, or Converting.
If you would like to use a Memoria Stone for any of these actions, unlock it first using the following method.
- How to unlock:
Details of the target Memoria Stone > Tap the lock icon at the bottom left