Librarian Donathan on Amber Ledge wants you to collect the Beryl Prison Key from one of the Beryl Mage Hunters at Beryl Point and use it to release a trapped mage from an arcane prison.
1x Arcane Prisoners Rescued
Greetings, [class]. I am Donathan, a loyal representative of Dalaran.
Forgive my abruptness, but we find ourselves in the midst of a crisis. Mages all across Azeroth are being abducted and I have been authorized to conscript anyone able to assist in the unraveling of this mystery.
The camp just south of ours is where our investigation begins. I call upon you to rescue one of the imprisoned mages held there. You must obtain a key from one of the mage hunters and use it to open an arcane prison.