Scryers

The Scryers are a faction of blood elves led by Voren'thal the Seer. The group broke away from Prince  Kael'thas Sunstrider, heir to the throne of Quel'Thalas and ruler of the blood elven race, and offered to assist the naaru in rebuilding Shattrath City. They are at odds with the Aldor, and compete with them for power within Shattrath and for the naaru's favor. Nowadays, the Scryers are notable for having the largest library out there, housing the "greatest repository of lore in Outland".