In "For Whom the Bell Tolls," a main quest in Kingdom Come: Deliverance 2, Hans requires your assistance at Trosky Castle. This involves brewing a Fever Tonic using alchemy.
Locating the Fever Tonic Recipe:
The recipe resides within the Surgeon's Workshop in Trosky Castle. Access is achieved through stealth or persuasion. To persuade the Chamberlain, complete "For Whom the Bell Tolls" objectives up to delivering the horseshoe. Then, speak with Cook Fanka at the forge; offering to help with her locked chest grants access to the noble's kitchen. Convincing the ailing Chamberlain of your medical abilities (through skill checks) provides workshop access. Alternatively, if skill checks fail, steal food, proceed to the courtyard's other side, bribe a guard with the stolen food, and sneak into the workshop. The Surgeon's journal, containing the recipe, is on a bookshelf.
Brewing the Fever Tonic:
The necessary herbs are pre-arranged on the surgeon's station. Follow these steps, referencing the Fever Tonicum recipe in the journal:
- Pour wine into the cauldron.
- Add 3 handfuls of Feverfew.
- Lower the cauldron and boil for 2 turns of the sandglass.
- Grind a handful of Elderberry Leaves.
- Add the ground Elderberry Leaves.
- Add 2 handfuls of Ginger.
- Obtain a phial from the bottom-left shelf.
- Distill the tonic using the Still.
Additional herbs are available in the chest if needed.
Completing the Quest:
After brewing the Fever Tonic, locate Thomas. If you gained the Chamberlain's trust (by brewing a digestive potion), return with both potions. Otherwise, use the noble's kitchen to reach the chapel and find Thomas and Adele. Speak with Adele to conclude the quest.
