Disturbance is a main quest in The Witcher 3: Wild Hunt.
Note: The 
rewards in this quest will decrease after reaching level 29 (25 before Patch 4.0).
Walkthrough[]
Begin by heading up to the guest room. Just as you reach the floor, you will see and hear a magical explosion, followed by Yennefer cursing. Approach and you will enter a cutscene, where she will explain that "this was the third crystal" and that she has an urgent call to make. She tells you she suspects there is a disturbance causing the megascope crystals to malfunction, and entrusts you to find it. As the conversation ends, she will give Geralt a potestaquisitor - an equippable quest item, which will hum when near a magical disturbance.
Note: if Geralt rejected Yennefer during the secondary quest The Last Wish and you choose to argue with Yennefer about the bed, she will teleport Geralt to the lake north of the fortress.
Then go to the main hall and use it, following the sound as it gets louder and stronger. The disturbance is near Uma so you may think he is the problem but he is not, nor is it in the cage or wall (there's an interaction showing there, but that's just to look at the mural on the wall). It is the crates right next to the cage, that contain dimeritium bombs made by Lambert. Once you interact with them, Vesemir will take them away while Geralt keeps on eye on Uma.
When Vesemir returns, head back up to the guest room and talk to Yennefer to let her know you found the disturbance and what it was. She will assume Lambert did that on purpose, and you have the choice to quip that he knew what he was doing, or that he knows nothing about megascopes. Regardless of your answer, after this, Yennefer will prepare to make her call and tell Geralt to behave himself. Now, Yennefer and Geralt will converse with Ida Emean aep Sivney about Uma's curse and the White Frost. You will be given a few different dialogue options, which can be 'right', earning straight answers and no consequences, or, picking any of the wrong ones will earn you immediate disdain followed by a reprimand after Ida's call.
The correct conversation options are as follows:
- Caed'mil, Aen Saevherne.
- (Optional) Know the dialect?
- Heard the words before, haven't you?
- What's the problem?
After the conversation with Ida, if you picked the wrong conversation options, Yennefer will ask Geralt to apologize for his behaviour to which he can agree or not. If you got them all right, it goes right into the standard dialogue. Needing to apologize or not, you can ask Yennefer if she understood all that, and if you chose the optional "Know the dialect" prompt, about the great Migration that was mentioned, then the progressive "What now?", which will lead you into the end of the conversation and onward to complete the other tasks if you haven't already of the umbrella quest Ugly Baby.
Journal entry[]
- Vesemir told Geralt that Yennefer had set up her trusty megascope as soon as she arrived at Kaer Morhen, but could not get it to function for the life of her. This news greatly troubled the witcher. If Yennefer was planning to use her megascope, that meant a conversation with other sorceresses was in the works – and that in turn meant scheming, politics and other things Geralt truly could not stand.
- As expected, Yennefer did not extend Geralt the warmest of greetings. Nevertheless, Geralt, ever the noble and patient soul, helped the sorceress eliminate the source of the magical disturbance. It turned out the culprit was a case of dimeritium bombs Lambert had carelessly placed near the sorceress' room. Tsk, tsk, Lambert.
Objectives[]
- Find and help Yennefer.
- Return to Yennefer.
- Find the source of the magical disturbance using the potestaquisitor.
- Let Yennefer know you removed the source of the disturbance.
Notes[]
- When you first arrive with Uma and talk to Vesemir, he will mention that Yennefer was asking him to do this task.