Hi,
Here are the changes made during the 12/05/23 update:

• Magical Ice Weapons are now upgradeable
• You can now exchange providences at elemental dungeons
• Added a quest allowing you to obtain a secondary heart of the black dragon on Front Line, It have to be completed on D-Day and limited to 2 times per day
• Added Christmas chest keys as a reward for the server quest from Rudolph

The DGN Masters team.