Under the category Records of Eminence > Combat (Region) > Combat (Adoulin 2) > Moh Gates III there is a bug.
The objective for this trial is 5 times Writhing Leech, except the Writhing Leech doesn't seem to exist (anymore).
Maybe it has been removed sometime in the past with an update when higher level creatures were added, but the trial has not been adjusted yet.
Please adjust so it will be possible to clear all RoE quests.