Reliquary
From WoWWiki
The Reliquary is located inside Scholomance, just past the first closed gate. It leads to the Chamber of Summoning through another closed gate. The Reliquary is a large, open room lined with bookshelves containing tomes of dark knowledge. A reliquary is a storage space for sacred relics, most of them presumably of a necromantic nature.
Besides numerous wraiths, high elven necromancers and skeletons, the Blood Steward of Kirtonos can be found here.
