Assassins Creed Valhalla All Ability Locations – Abilities in assassins creed Valhalla are found inside of books of knowledge marked on the map and are needed for getting 100% completion (Completionist All the Way trophy or achievement).
A Book of knowledge is the only way to get abilities in game for your character. Abilities are separate from skills which you earn by gaing XP and levelling up your character.
Every ability can be found twice (in different locations), finding the two abilities makes the ability stronger.
Here are the locations of every ability in game by region:
Rygjafylke Ability Locations
Grantebridgescire Abilities Locations
Ledecesterscire Ability Locations
East Anglia Ability Locations