Garain di Spesi tells you, "So, another eager young acolyte wishes to serve the Society and climb the ranks. I have a task for you, if you are up to it. There is a particularly troublesome undead in the Empyrean Graveyard in the Direlands... For reasons beyond your need to know, we would like the Shambling Archivist destroyed. Seek out the Graveyard, find the Archivist wherever it may wander, and grant it the sweet release of temporary death."
