The Potestaquisitor Inquisitor

Enter the main fortress interior of Kaer Morhen, and head to the southeast tower through the banqueting hall. Up the large spiral steps, you eventually reach a large circular room and Yennefer exploding both magically and verbally. It seems her megascope is extremely broken. Speak to her how you wish, as she explains her frustration with the other witchers. She tells you she will reveal all in time. You can:

• Ask what she needs you to do, which continues the quest.
• Tell her you heard what she did with the bed (toss it out of a window), and she fumes about you and Triss being together. You may either apologize or pretend you had memory loss, resulting in a further angry outburst, and Yennefer tiring of the conversation by teleporting you over the lake at the foot of the mountain! After a swim and trek back up to the fortress, you can continue this (or any other active) quest.

Your tasks are to help both Eskel and Lambert, but also attend to the broken megascope. Yennefer reckons an energy source nearby is generating disturbances, and must be neutralized. She needs to contact a sorceress urgently, and hands you an odd-looking contraption known as a potestaquisitor. You must use it to find the energy source.