In *Kingdom Come: Deliverance 2*'s main quest, "For Whom the Bell Tolls," Hans needs your help at Trosky Castle. A crucial step involves brewing a Fever Tonic using alchemy. Here's how:
Kingdom Come: Deliverance 2 Fever Tonic Recipe & Location
The Fever Tonic recipe resides within the Surgeon's Workshop in Trosky Castle. Access is gained in two ways: sneak in, or convince the chamberlain. To persuade him, offer to create a digestive potion. Successful skill checks will grant you workshop access. Alternatively, 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 leads you to the noble's kitchen and the ailing chamberlain. Convincing him to let you help will also unlock the workshop.
If persuasion fails, steal some food, exit the kitchen, and use the courtyard stairs to reach another kitchen door (guarded). Bribe the guard with the stolen food. Once he leaves, sneak upstairs to the Surgeon's Workshop; the recipe is in the journal on the bookshelf.
How to Brew Fever Tonic
The necessary herbs are already at the surgeon's station. Follow these steps:
- 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.
- Take a phial from the bottom-left shelf.
- Distill the tonic using the Still.
Don't worry about failures; there are ample herbs available, including more in the chest.
Once you've brewed the Fever Tonic (and optionally, a digestive potion), find Thomas. If you have the chamberlain's trust, return with both potions. Otherwise, use the noble's kitchen to reach the chapel and find Thomas and Adele. Speak with Adele to complete the quest.
