Bring 10 Ghostly Essences to Archmage Alturus outside of Karazhan.
As you may have noticed, the outside of Karazhan is crawling with ghostly beings. The reason for their existence is unknown and unknowns bother me!
Bring me their ghostly essence so that I may study their nature. Karazhan has many secrets, [player]. I'm determined to uncover all of them.