Eivor will eventually cross paths with Kjotve the Cruel in , and he will have many spies at his disposal that you will need to take out. The rogue warlord's spies work in the shadows, and if you are trying to complete the "" quest, you will need to hunt them down.
When you start the quest, the location of the first spy will be marked on the map as a green quest marker. This spy is the intruder who wakes you from your sleep during the quest. You can use some stealth mechanics and your hidden blade to take out this first spy. However, you will need to find two more spies on your own from this point, as their locations will not be marked on the map.
The other two spies can also be found in the Rygjafylke region of. To find their exact locations, send up your raven to scout the area. You will notice that both spies are hiding near Fornburg to the left of the docks, in a small camp hidden behind rocks. You can approach the came by facing the water and going left. There, you will be able to climb up some rocks that lead to the training area. To find the camp, climb the gravel path behind a building that abuts the mountain.
It is recommended to use the hidden blade in AC Valhalla to take out the two spies instead of starting a loud fight.
You can use the bushes while crouching and the whistle mechanic to attract one of the spies. When one of them is close enough, you should be able to take the spy out fairly quickly. For the second spy, you can do a jump attack like air assassination or other advanced assassination moves to take them out quickly.
After successfully eliminating the spies, Eivor must return to the docks and talk to Sigurd to continue the quest in . The next step is to loot Kjotve's warriors.
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