In Kingdom Come: Deliverance 2, Hans's main quest, "For Whom the Bell Tolls," requires crafting a Fever Tonic to help someone at Trosky Castle. Here's how:
Locating the Fever Tonic Recipe:
The recipe resides within the Surgeon's Workshop in Trosky Castle. Access is gained either by 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 gains access to the noble's kitchen, where the ailing Chamberlain is found. Successfully completing skill checks convinces him to grant access to the workshop. Alternatively, sneaking into the kitchen (via a courtyard route if persuasion fails) allows access after potentially bribing a guard with stolen food.
Once inside the workshop, locate and read the Surgeon's journal on the bookshelf to obtain the recipe.
Brewing the Fever Tonic:
The necessary herbs are already present on the surgeon's station. Follow these steps:
- Pour wine into the cauldron.
- Add 3 handfuls of Feverfew.
- Lower the heat and boil for 2 turns of the sandglass.
- Grind a handful of Elderberry Leaves using the mortar and pestle.
- Add the ground Elderberry Leaves.
- Add 2 handfuls of Ginger.
- Take a phial from the bottom-left shelf.
- Distill the tonic using the Still. Multiple attempts may be necessary.
Completing the Quest:
After brewing the Fever Tonic, locate Thomas. If the Chamberlain was persuaded, return with both the Fever Tonic and a Digestive Potion. Otherwise, use the kitchen to sneak to the chapel and find Thomas and Adele. Speaking with Adele concludes the quest.