Ilthalaine's purpose in Shadowglen is to help train young night elves and ensure that the balance of nature is maintained. To that end, one of his first tasks is for young adventurers to strike out and thin the nightsaber population. Nixxiom gives a more detailed analysis of Ilthalaine's life and story in his youtube channel, that people could watch at their own risk.
Removed questsNote: These quests are no longer associated with this particular mob/NPC/item.
-  (World of Warcraft Collector's Edition)