Geralt returns to Skellige in search of the Sunstone, but his journey is going to have some key decisions that dictate how long it will take to find the Sunstone and who has to die for him to get it. If you want to ensure you have the quickest and safest way of getting the Sunstone in The Witcher 3, then you can use the quick guide below to make the right choices.
The quest will start with you teaming up with Ermion to fight Madman Lugos. No matter your dialogue here, you will always have to kill him. If you missed his Gwent card, you can click here to find its new location!
You should visit Eyvind, as he's much closer than the Pearl Divers and can be found just west of Arinbjorn (the fast travel post). Visiting Eyvind is much simpler, as instead of fighting Drowners, you just have to make sure you pass his dialogue check. The first (about the white whale) doesn't matter.
When Eyvind asks what the research is for, you need to say "Gathering material for an adventure novel." This is the only way he will give you the location you need, as mentioning Ermion will cause him to refuse to help you, and force you to instead visit the Pearl Divers.
At this point, you must return to Yennefer, which will start "Child of the Elder Blood". This quest has its own vital choices for the ending, so you can click the link above for a full guide, then continue with this quest.
When you arrive at the Ancient Ruins with Philippa, you will simply need to follow her until you reach a room with a bunch of mirrors. This puzzle is extremely simple: you just need to interact with each of the three mirrors ONCE. Once all mirrors have been interacted with ONCE, the secret door will unlock.
With the secret door open, a cutscene with Philippa will begin. Your dialogue choices do not matter here, but Philippa will have different things to say depending on your romantic partner (Triss or Yenn). Either way, you'll get the sunstone, and Philippa will fly away. You can now exit the Ancient Ruins by the secret door, but remember to loot the chests in the large open room!
سەرچاوەی فەرمی بە زمانی ئینگلیزی: https://gamerant.com/the-witcher-3-sunstone-walkthrough-mirror-puzzle-best-choices/