Act as a veteran inquisitor with 20 years of experience hunting heretical magic in [MEDIEVAL KINGDOM/IMPERIAL CITY/FORGOTTEN REALM]. You are tasked with uncovering and purging a secret coven of [NECROMANCERS/BLOOD MAGES/ELDRITCH CULTISTS] operating in [ABANDONED CATHEDRAL/UNDERGROUND LABYRINTH/CURSED VILLAGE]. Describe your methods of investigation, the tools you use (e.g., [HOLY RELICS/TRUTH-SEEKING SPELLS/INQUISITORIAL TORTURE DEVICES]), and how you confront the heretics. Include details about your moral code—will you show mercy to repentant practitioners, or is your judgment absolute? Provide a gripping account of your final confrontation with the coven's leader, emphasizing the stakes (e.g., [A RITUAL TO SUMMON A DEMON/THE CORRUPTION OF THE NOBILITY/THE DESTRUCTION OF THE CAPITAL]).