Act 3 of Baldur's Gate 3 presents players with a myriad of quests, including several hidden side quests. One such intriguing quest is "Find the Mystic Carrion's Servant," a task offered by Mystic Carrion, a concealed entity situated in Philgrave's Mansion in Lower City. This guide aims to detail each phase of this multi-layered quest.
How to Gain Access to Philgrave's Mansion

Upon entering Lower City, you will find Philgrave's Mansion situated near the area's entrance. To gain access, you have two notable options:
- Arcane Method: Approach the stone-like door and use a character proficient in Arcane skills to dismantle the magical barrier. Doing so will reveal a passageway.
- Brute Force: Alternatively, characters like Karlach can destroy the stone barrier, creating an opening to enter.
Either method will successfully grant you access to the mansion.
Locating Thrumbo

The quest demands you to find Thrumbo, who resides in a diminutive dwelling past the Heapside Strand waypoint. After leaving Philgrave's Mansion, head towards the waypoint. Soon, you will spot vines to your right; climb down these to discover Thrumbo's hideout. Upon entry, follow the blood trails to a wardrobe. Interacting with this will result in Thrumbo's appearance.
Decision Point: Assist or Eliminate Thrumbo
Upon meeting Thrumbo, you are presented with two choices:
