Witcher 3 For the Advancement of Learning
This quest is acquired automatically upon completing the side-quest ‘A Favour for a Friend’.
Following the previous quest, you are going to want to head over to the Tower on Fyke Isle again. You can either swim across, grab a boat or use the fast travel signpost we would have unlocked earlier to reach the tower quickly.
Approach the tower for a scene. Here you’ll have a few dialogue options:
- “Can’t let you“ – This will initiate a boss fight.
- “Hundreds could die…“ – This will start up a new conversation where you can convince her to go to Kaer Morhen.
- “It’s suicide” – This will start up a new conversation where you can convince her to go to Kaer Morhen.
- “Do what you want“ – She’ll leave.
Note: Recruiting her to go to Kaer Morhen is important as it is required to complete the ‘Brothers in Arms: Velen’ optional main quest and is also needed for the ‘Full Crew’ achievement/trophy and for help later in the game.
Note: Allowing Keira to leave or triggering the boss fight will have you fail the ‘Brothers in Arms: Velen’ quest.
Despite all the reasons that you shouldn’t, If you do choose the “Can’t let you” option, you’ll initiate a boss fight.
Boss: Witch
This boss favours ranged attacks and uses magical lightning strikes and fires rock projectiles at you that you’ll need to roll/dodge to avoid taking damage. It is also able to teleport quite a long distance which it will do to constantly keep you at range where it can utilise its projectile attacks.
The trick to beating this one down as quickly as you can is to roll/dodge the attacks it throws at you to get in close and mash away with your sword until it teleports away. Repeat the process until a scene plays to end the quest.
Either way you choose to play out the end of this quest chain, after a brief scene the quest will draw to a close.
Note: No matter the choice you make, At this point you will earn 200XP.
Note: At this point you will earn the achievement/trophy ‘Friends With Benefits’.