Hello, Tamers.

After the last update, we've received report and found an issue related with achievement "Legendary Holy Knight".
The title is not normally displayed even after player use the item.
We are aware of this issue and will fix it as soon as possible.
However, before the issue is fixed, please try not to use the item.
For the players who already used the item, we'll restore the item for you after it is fixed.
Sorry for the inconvenience.
The problem has been resolved.

Thank you.