You can only obtain the title with the quest: Prevent the Ritual of Displacement http://www.rom-welten.de/database/view.php?id=427482
But since the instance was closed due to many problems (shocker) you could not do it and was then stuck in mainline if you wanted that title.
We where told to go ahead and just talk to npc and this will be fixed later (on old forum) so you could obtain the title even if you talked to the npc.
Now wondering if this was just a fairytale since still nothing mentioned about a fix.
Not to mention the whole concept is too confusing to most players, they do not tend to read the descriptions very good.
Mainline is also needed to be able to see the codex nowdays which also makes you want to complete it so you will be able to use them.