To make Fever Tonic in Kingdom Come: Deliverance II, brew wine with three feverfew, two ginger, and one elderberry leaf: boil the feverfew for two turns, grind and add the elderberry leaf, add the ginger, then distil the mixture. During For Whom the Bell Tolls, take the finished tonic to Adela in the chapel at the top of Trosky Castle’s Maiden Tower.
Fever Tonic ingredients
The in-game recipe calls for:
- Wine
- 3 feverfew
- 2 ginger
- 1 elderberry leaf
For this quest, the surgeon’s workshop in Crone Tower is the practical place to look: the quest walkthrough locates the Physician’s Journal, alchemy bench, and an ingredient chest there. It says wine is supplied at the bench and the chest holds the herbs. The workshop is across the castle from Captain Thomas. KCD2.org’s Thomas and rescue-route walkthrough describes access by either a kitchen route or a dialogue route.
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How to brew Fever Tonic
- Pour wine into the cauldron.
- Add three feverfew and boil the mixture for two turns.
- Grind one elderberry leaf and add it to the cauldron.
- Add two ginger.
- Take a phial and distil the mixture at the still.
The order is part of the recipe: don’t skip the two-turn boil, and grind the elderberry leaf before adding it. The recipe and sequence are also listed in PowerPyx’s alchemy recipe reference and Prima Games’ Fever Tonic walkthrough.
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Once it is brewed, bring the tonic to Adela in the chapel at the top of the Maiden Tower in Trosky Castle. The objective is to use it to treat Captain Thomas; his recovery lets him intervene in the situation involving Hans Capon. The quest route and delivery location are covered in the KCD2.org walkthrough.
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Can you use a ready-made tonic instead?
The same walkthrough reports that a separate, harder-to-open chest may contain a ready-made Fever Tonic. It is an optional shortcut, not an additional item required alongside the brewed potion. Choose between the routes based on your situation:
| Route | What it involves | Trade-off |
|---|---|---|
| Brew from the workshop ingredients | Use the supplied wine, ingredient chest, alchemy bench, and still; follow the recipe above. | The recipe is specified, but you must complete the brewing steps. |
| Try the separate chest | Attempt to open a harder chest that may contain a finished tonic, according to the secondary walkthrough. | Potentially quicker if successful, but its contents are not guaranteed by the source. |
The walkthrough’s lock and access information is from a secondary source and has not been independently verified. You do not need to open both chests.
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What Fever Tonic does
PowerPyx reproduces the in-game effect text as: “This tonic reduces fever if given in time.” The wording indicates a time-sensitive quest treatment; this is an in-game potion, not a real-world remedy.
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