Starting from 00.01 GMT April 29 and up to 10.00 GMT May 4 (next scheduled maintenance) you are to exterminate the following monsters - as many as is possible:
Zombie (58 lvl)
Skeleton Archer (58 lvl)
Skeleton Warrior (59 lvl)
His Royal Majesty King Roland offers generous rewards for the extermination of these Undead spawn!
Look for details here: https://us.royalquest.com/forum/index.php?/topic/2615-crush-the-evil-undead-peril/