This page is about the Thorn of Slumber Ability in Assassin's Creed Valhalla (AC Valhalla). Read on to learn Book of Knowledge location and how you can get it in the game.
List of Contents
 Thorn of Slumber |
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| Description | An arrow marked with svefnthorn symbol put targets to sleep almost instantly. |
|---|---|
| Upgrade | On impact, arrows expel a cloud of poison, putting anyone nearby to sleep. |
| Location | |
|---|---|
| Map View | Overworld View |
You can find the Book of Knowledge for this ability in the middle tower of Gryttirsand. Climb to the 2nd floor of the tower, break the wood blocking the ladder, and head down to get the Book of Knowledge.
| Location | |
|---|---|
| Map View | Overworld View |
Find Dover Fortress on the eastern part of Cent and head there. Find the highest location in the area to see the Book of Knowledge. You can find the Book of Knowledge in a locked building. Get the key on top of the tower, just behind the building where the Book of Knowledge lies. Use it to open the door and get the Book of Knowledge.
| List of Abilities | |
|---|---|
| Melee | Ranged |
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|---|
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Thorn of Slumber Book of Knowledge Location
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