It is part of the new svn to unlock geffenia, and it is impossible to "fail" at the quest... it is simply talking to the right npc icons. What it matters is the amount of time to find it all, simply~ There are a few quests that generate "free experience" by completing the quest, but The Sign is the most notable one of all for it is one of the longest, and it is actually important and very worth the whole afternoon required to do the quest.
Namin? believes that a few others such as Fall of the S. Republic, History of Juperos, Einbroch Murder Mystery, Eye of Hellion (not sure if this one is... possible on heRO though, since it uses the Gef4 map's original monster but that is modified as a heRO map) and a few others also generate a varying amount of experiences...
none of them that entertaining at all, however, it is just walking back and forth finding npcs nonstop
; guess that it is still a change from grinding...