The Answer
Description
Garridan doesn't know who the Ethereal Immortal is, but she did recommended that you ask Tanis Ka. Go ask Tanis Ka in Sunstream.
Award NPC
"Sunstream" 161 146(164)
Require quests
Quest Stats
Level: Any
Also fail parent quest
Quests in chain:
Dialogs:
Finishing Quest:
Ethereal Immortal, eh... I see, it's a riddle. Hah! And a good one, at that!
- What do you mean?
Just break it down. "Ethereal" means many things: delicate and heavenly, but also airy and intangible. This immortal may want you to believe he's heavenly, but I think his name really means "false." Do you see? He gives an impression of being wise and helpful, but if you try to nail down his intentions, he slips away.
- I should've investigated him before! He made a fool of me!(End quest)