Sepulchre of the Witching Hour's Sage (5E)

From publisher blurb: For 4 Characters of Level 5 There have always been those who would stop at nothing to gain answers to their questions. Does your party dare to meet such a man whom even history cannot forget? And are you willing to pay the price for the answers you seek? The characters may be actively seeking the Sage for their own personal benefit or on behalf of an NPC, or he could hold the answer to a burning question in your campaign.