This is automatic translation (from Korean) of 12.4.2021 update notice for Korean server (we will probably get same at our next maintenance):

Good morning. This is Cal Online.
The following is the update on April 13 (Tue).

1) Chungmugong event added

-For more information, please refer to the event page.

More info here -

2) Added map boss of the dead

-You can summon the owner of the deceased with the NPC Monument of the Dead in the Lawless Zone of the Dead.

-You can check the exchange of the ring of the dead in the exchange shop of the Infinite Tower NPC.

-The deceased's amulet can be purchased from the Celestial Guard NPC as an honorary reward point.

3) Chiwoo Cheonwang Shingi material daily quest added

-Daily quests can be conducted for Chiwoo Cheonwang Shingi Crafter.

4) Add repair tool exchange

-You can exchange the high warlord's repair tools and hanbok repair tools for general repair tools.

5) Infinite Tower Swordsman skill effect error correction

-Fixed a problem where the effects of the sword sword, sword check, and fall sword were not applied to some monsters of the Infinite Tower.

6) Fixed character selection window UI broken error

7) Corrected the error of wishing the jar of desire

8) The 17th anniversary event ends

-The winners of the 17th anniversary event will be announced as a future announcement.