Go to the Ald'ruhn guildhall and find Manis Virmaulese. With an appropriate sneak skill the Nerevarine can sneak past him. Alternatively, he will need to be killed. After killing Manis, the Nerevarine must go downstairs to the right in the alchemist's corner. The Tanto is in a small locked (65) chest. After stealing it, the Nerevarine should return to Aengoth to complete the quest.
|10||Aengoth the Jeweler told me that he heard the Guild of Mages in Ald'ruhn is empty and that now would be a good time to fetch Anareren's Devil Tanto.
|100||Aengoth thanked me for bringing him Anareren's Devil Tanto.