KCD2 Thunderstone is a long Kuttenberg side quest that begins with Kona in Grund and ends with one real stone but three possible owners. The practical route is to expose Thomlin's fake, question Peter in Raborsch, rescue Hensel from Andrew Ramhead's camp, then heal Mlada's husband in Suchdol. At the end, give the KCD2 Thunderstone to Kona for the largest bundle of conventional rewards, return it to Thomlin for 150 Groschen or Unarmed XP, or keep it for a permanent stamina-related buff while the KCD2 Thunderstone remains in Henry's inventory.
Best-choice answer: Give the KCD2 Thunderstone to Kona if you want the Lethean Water recipe, Alchemy XP, the Grund stud-farm discount, and her optional 100 Groschen. Keep the KCD2 Thunderstone if the permanent stamina bonuses matter more than money, XP, and role-playing the promise you made to Kona. Finish KCD2 Thunderstone before the point of no return in Oratores, because the Suchdol stage can become unavailable afterward.
KCD2 Thunderstone Quest at a Glance
| Step | Location | What matters |
|---|---|---|
| Start | Grund | Speak to Kona during the Kuttenberg chapter; Innkeeper Grosch can reveal her marker |
| Fake stone | Horschan | Inspect Thomlin's stone or beat him in a wagered fistfight |
| Missing stone | Raborsch | Question Peter about Hensel and Andrew Ramhead |
| Rescue | Military camp northeast of Raborsch | Free Hensel, then speak to him after he escapes |
| Real stone | Southern Suchdol | Complete Primum Nil Nocere for Mlada |
| Final choice | Grund or Horschan | Give the KCD2 Thunderstone to Kona, return it to Thomlin, or keep it |
The KCD2 Thunderstone trail covers much of the western Kuttenberg region. Use the Kuttenberg map and carry Saviour Schnapps before the Thomlin and Peter treatment checks. This is one of the KCD2 side quests that should be completed before late-game world changes.
How to Start KCD2 Thunderstone
Travel to Grund in the northeast of the Kuttenberg map after reaching the Kuttenberg chapter. Ask Innkeeper Grosch what is happening locally to reveal Kona's marker, or go directly to Kona outside the house opposite the tavern. Sources disagree on the exact KCD2 Thunderstone prerequisite: some list completion of Main Quest 14, Speak of the Devil, while databases allow the start after discovering Grund. If Kona has no KCD2 Thunderstone dialogue, finish Speak of the Devil and ask Grosch for the rumor before checking again.
Ask Kona about the rumor and let her explain why she needs the KCD2 Thunderstone. A successful Persuasion check reveals more of her personal reason, but it is not required to begin. Agree to help her and ask exactly what a genuine stone looks like. That description—especially the hole through the middle—gives Henry a way to recognize Thomlin's fake later.
Kona believes the KCD2 Thunderstone must be acquired honestly or it will lose its protective value. Suggesting theft costs reputation, although the KCD2 Thunderstone quest still provides dishonest shortcuts. For the clean route, promise to win or recover it rather than steal it.
Finish KCD2 Thunderstone Before Oratores
Do not leave the KCD2 Thunderstone unfinished until after the main-story point of no return in Oratores. Mlada and her husband live in Suchdol, and multiple post-story reports describe the village being empty when players reach this step. Complete the Mlada stage—and preferably the entire KCD2 Thunderstone quest—before confirming that late-game cutoff.
KCD2 Thunderstone: Thomlin and the Fake Stone
Travel west from Grund to Horschan and find Thomlin Bruthans at the large farm on the village's western side. He used to wager the KCD2 Thunderstone in fistfights but now refuses to risk it. There are three useful approaches, and all reveal that his current stone is fake.
Fast Route: Inspect the KCD2 Thunderstone
Ask Thomlin to show you the KCD2 Thunderstone. Pass the dialogue check to inspect it, then use Scholarship or Kona's description to point out that it lacks the correct hole. Thomlin admits the KCD2 Thunderstone is fake and directs you toward Peter and Hensel in Raborsch. This route can bypass the fistfight and its preparation.
Fight Route: Wager with Thomlin
To fight, pass one of Thomlin's hard dialogue checks or complete his Fight Dirty activity first. Bring 500 Groschen for the stake. After Henry wins, speak to Thomlin again; instead of handing over the real KCD2 Thunderstone, he confesses that Peter and Hensel stole it.
If you pickpocket Thomlin, the object you take is still the fake KCD2 Thunderstone. It does not grant the real inventory buff and does not end the search. Confront him or use the dialogue route to learn where the genuine KCD2 Thunderstone went.
Finding Peter in the KCD2 Thunderstone Quest
Ride west to Raborsch. Peter normally works in the cabbage patch near the first farm by the village entrance. Tell him Thomlin sent you; coercion is possible but unnecessary. Peter explains that he and Hensel took the KCD2 Thunderstone, then tried to attack Andrew Ramhead's band. The raid failed, and Hensel is now a prisoner.
Ask Peter for the camp location. The search area lies northeast of Raborsch, along the stream in the woods between Raborsch and Bohunowitz. Make a manual save before approaching because the soldiers become hostile when they detect Henry.
How to Rescue Hensel for KCD2 Thunderstone
Hensel is tied inside a wooden hut at the rear of the military camp. The safest KCD2 Thunderstone rescue is a night infiltration:
- Wait until roughly 1–2 a.m. and wear quiet, dark clothing.
- Approach from the hill and cliff side west of the stream.
- Leave KCD2 Mutt behind before entering; his movement can alert the guards.
- Cross the stream, crouch through the tall grass, and move around the sleeping soldiers.
- Enter the rear hut, untie Hensel, and withdraw without trying to negotiate with ordinary guards.
A diplomatic route also works: tell the entrance guard that Henry wants to see Andrew, then pass Andrew's difficult dialogue check or pay the 1,000 Groschen ransom. A direct fight is the other option, and sleeping enemies may rise without their weapons if the camp is alerted at night. The KCD2 Thunderstone route does not require killing Andrew Ramhead or clearing every soldier, so choose the approach that fits Henry's build.
After Hensel runs away, do not assume the objective is finished. Follow the marker or return to Raborsch and speak to him again. Hensel reveals that Ramhead took the real KCD2 Thunderstone and sold it to Mlada in Suchdol. He can also mark the optional “Two dead trees” cache near the camp; that loot is separate from the KCD2 Thunderstone.
Getting the Real KCD2 Thunderstone from Mlada
Mlada lives at the southern end of Suchdol. She bought the KCD2 Thunderstone because she hopes it will help her bedridden husband, Peter. She will not willingly trade it until Henry treats him. Agreeing starts the task Primum Nil Nocere.
You can pickpocket the KCD2 Thunderstone from Mlada, but that skips the intended medical task and may leave its journal state awkward. Save before examining Peter instead. Several examination and treatment checks are one-attempt decisions, so a failed diagnosis is easier to prevent than repair.
KCD2 Thunderstone Primum Nil Nocere Treatment
Peter's problem is severe anxiety and fear rather than a fever or physical injury. Examine him with every available Strength, Vitality, and Agility option you can pass, then choose the diagnosis that he is unnaturally anxious.
The most reliable treatment item is Chamomile Brew. If Henry does not have one, buy chamomile and sage in Suchdol and brew it at the castle alchemy bench, or obtain the potion from an apothecary. The KCD2 recipe guide covers potion preparation and the Lethean Water reward offered later.
After giving Peter the brew, use as many helpful dialogue options as Henry can pass:
- recommend a change of diet with Scholarship;
- pray with him through a Speech check;
- advise him how to handle fear through the available Might or Thievery-style response;
- use the very hard “healing spell” claim only if Henry's dialogue score supports it.
More successful steps improve the KCD2 Thunderstone treatment result, but do not gamble blindly. Drink stat-boosting potions and save before the examination if the checks appear hard. Community reports show that failing too many checks can make Mlada withhold the KCD2 Thunderstone, leaving reload, later skill improvement, or theft as the remaining routes.
Tell Mlada the treatment is complete, then wait until the journal updates. This normally takes at least one full in-game day; some walkthroughs and game states require roughly two. When Peter recovers, speak to Mlada and choose the response that the KCD2 Thunderstone can now help other people. She then hands over the genuine KCD2 Thunderstone.
KCD2 Thunderstone Best Choice and Rewards
The KCD2 Thunderstone quest has no single best ending for every build. Kona gives the broadest reward bundle, Thomlin gives a simple money-or-training choice, and keeping the KCD2 Thunderstone gives the only permanent combat benefit.
| Final choice | Confirmed reward | Best for |
|---|---|---|
| Give KCD2 Thunderstone to Kona | Alchemy XP, Lethean Water recipe, Grund stud-farm discount, optional 100 Groschen; access to paid Journeyman Craftsmanship training | Most conventional rewards and Kona's intended story outcome |
| Return KCD2 Thunderstone to Thomlin | Choose 150 Groschen or an Unarmed XP lesson | Players who want cash or fistfighting progress |
| Keep KCD2 Thunderstone | No hand-in reward; retain the Thunderstone Charm effects while it stays in inventory | Stamina-focused combat builds and collectors |
Kona's stable discount is only valuable if you still plan to buy a horse in Grund, so compare it with the options in the KCD2 horse guide. The Lethean Water recipe is useful for resetting perks, but it can also be acquired elsewhere. If neither matters, the KCD2 Thunderstone buff is the mechanically distinctive reward.
KCD2 Thunderstone Buff Stats
Current database and guide references list these effects while the real KCD2 Thunderstone remains in Henry's inventory:
- Stamina regeneration: +10%
- Attack stamina regeneration: +5%
- Block stamina regeneration: +5%
- Stamina consumption: -10%
The status may appear in an unexpected part of the buff interface, and player descriptions of the wording differ. The practical test is to keep only the real KCD2 Thunderstone—the fake object from Thomlin does not substitute for it—and check for the Thunderstone Charm status.
Should You Pickpocket the KCD2 Thunderstone Back?
Some players hand the KCD2 Thunderstone to Kona or Thomlin, steal it back, and repeat the process to stack rewards. Treat that as an exploit, not the reliable “best choice.” Reports disagree about stolen-state descriptions, duplicate stones, and whether the visible effect behaves normally afterward.
For a clean save, make a manual save and choose one owner. Give the KCD2 Thunderstone to Kona for the intended reward bundle, or explicitly tell Kona or Thomlin that Henry is keeping it if you want the buff without a stolen item state.
KCD2 Thunderstone Mistakes to Avoid
- Do not mistake Thomlin's pickpocketable fake for the real KCD2 Thunderstone.
- Ask Kona what the KCD2 Thunderstone looks like before visiting Thomlin; it unlocks a clearer fake-stone route.
- Save before Peter's one-attempt examination and treatment checks.
- Bring or brew Chamomile Brew before starting the treatment dialogue.
- Speak to Hensel after the escape; merely untying him may not advance the KCD2 Thunderstone trail.
- Wait for the Primum Nil Nocere journal update before assuming the treatment failed.
- Finish the Suchdol stage before the Oratores point of no return.
- Do not sell or stash the real stone if you chose the KCD2 Thunderstone buff; its effect requires the item in inventory.
KCD2 Thunderstone FAQ
Can you skip the Thomlin fight?
Yes. Ask to inspect the KCD2 Thunderstone and pass the dialogue and Scholarship route that exposes it as a fake. Winning the wagered fight is an alternative, not the only way to reach Peter and Hensel.
Where is Hensel?
Hensel is in the rear wooden hut of Andrew Ramhead's camp northeast of Raborsch, beside the stream. Night stealth is easier than a daytime frontal attack.
What is wrong with Mlada's husband?
Peter suffers from extreme anxiety. Give him Chamomile Brew, pass additional supportive checks where possible, wait at least one in-game day, and return to Mlada.
Which KCD2 Thunderstone reward is best?
Kona provides the most separate rewards. Keeping the KCD2 Thunderstone is better for players who value ongoing stamina efficiency more than a recipe, vendor discount, XP, or Groschen.
Does the fake stone give the buff?
No. The fake KCD2 Thunderstone taken from Thomlin is a quest clue. The real stone comes from Mlada after Hensel explains where Ramhead sold it.
Can the quest be completed after the main story?
Not reliably. Suchdol changes during the late story, and Mlada may no longer be present. Complete KCD2 Thunderstone before crossing the point of no return in Oratores.
