The Sunstone
Geralt knew he could only defeat Eredin with the help of mages and on his own terms. Since the King of the Wild Hunt was traveling on the Naglfar, the spectral vessel known from Skellige legend, somewhere between worlds, our heroes had to summon him back and somehow cut off his escape route. Such a feat could only be performed by a group of mages acting in concert and aided by a legendary elven artifact - the Sunstone.
Map

Pin numbers match the objectives below. Open it on the interactive map →
Objectives
20- 1Ask Crach where Ermion is.Bridge to Kaer Trolde
- 2Defeat Lugos' men.Kaer Muire
- 3Defeat the Nilfgaardians.Bridge to Kaer Trolde
- 4Talk to Ermion.Gedyneith
- 5Talk to Ermion outside of Madman Lugos' territory.Gedyneith
- 6Set up the mirror system properly.Rogne
- 7Continue exploring the ruins.Kaer Trolde Harbor
- 8Get past the spike traps.On the map
- 9Disable the spike trap.Ancient Crypt
- 10Examine the Sunstone.Rogne
- 11Talk to the bard known as Eyvind.Arinbjorn
- 12Talk to the pearl diver.On the map
- 13Find and talk to the pearl diver.Eldberg Lighthouse
- 14Rejoin the sorceresses.Kaer Morhen
- 15Help Eyvind light the signal fire.On the map
- 16Meet Philippa in the elven ruins.Kaer Trolde Harbor
- 17Explore the elven ruins with Philippa Eilhart.Kaer Trolde Harbor
- 18Exterminate the monsters.Ancient Crypt
- 19Explore the elven ruins with Philippa Eilhart.Kaer Trolde Harbor
- 20Talk to Yennefer.Kaer Morhen
Journal
The emperor's flagship was anchored in Skellige's waters when Geralt arrived. His Imperial Majesty would preside over the battle in person - but more important to Geralt was the prisoner he held on his ship, the Nilfgaardian sorceress Fringilla Vigo, whose aid could turn the tide of Ciri's defense. Geralt thus asked the Emhyr to lend him his captive sorceress. Though Fringilla was a suspected traitor, Emhyr agreed.
Geralt overcame countless obstacles and found the Sunstone - a feat which, to give credit where it's due, would have been impossible without the help of Philippa Eilhart. Everyone knew what this meant: the preparations for the great battle against the Wild Hunt had come to an end, and what would follow their activation of the Sunstone would determine the fate of the world.