3rd class from RO 16th Anniversary Patch

[idamonli]

https://github.com/rathena/rathena/pull/3659/files

[burwinkelito]

Here, more info:
https://www.divine-pride.net/forum/index.php?/topic/3280-16th-anniversary-update-note-part-1/
https://www.divine-pride.net/forum/index.php?/topic/3723-kro-classes-improvement-project/

Also about the 1st and 2nd changes, kRO made a rebalance of many of them

https://www.divine-pride.net/forum/index.php?/topic/3453-kro-mass-skills-balance-1st-2nd-and-transcendent-classes-skills/