Necromancer's Moon (Quest)

Speak to Tar-meena in either the mystic archives or the mages quarters in the Arcane University, about the black soul gems. Then once you talk to her she will tell you to find a book entitled "Necromancer's Moon" within the Mystic Archives. Dont trouble yourself with looking, you'll find it on a small stool behind a desk to the right were you first walk into the Mystic Archives (It's blue). Talk to Tar-meena again about the book. Then it will say to take it to Raminus Polus after you talk to Tar-meena. Talk to tar-meena for the 3rd time about the book. Now you take it to Raminus Polus. Then go talk to Bothiel about the "Shade of the Revenant", she will then give a note and you have to show it to Raminus Polus.

Then you leave to the Dark Fissure (south of Cheydinhal). You will find a necromancer, kill him and take his note. Then give the information to Raminus Polus. Then you have completed the quest :)