This quest will start automatically after the conversation with Bjorn, which will take place at the end of the quest "The Ritual of the Berserker".
Newly rejuvenated, Bjorn charges to Beodoricsworth to exact revenge for his murdered wife.
The Vengeance of the Berserker
Related points of interest
Quest stages of The Vengeance of the Berserker
1. Attack with Bjorn / Kill soldiers to flush out the Mercian lord
Follow Bjorn to Beodoricsworth ...
...and keep killing the enemies until you fill up the progress bar.
2. Kill the Mercian Lord
Once you kill enough enemy soldiers, their leader - the Housecarl, will pop up on the battlefield and it's your job to kill him.
3. Leave with Bjorn / Speak to Bjorn
Leave the monastery area and when you are safe, talk to Bjorn. He will ask you to collect his bear's favorite flowers.
4. Gather flowers for Njal
You can gather flowers for Njal near the Gallows Tree.
5. Meet with Bjorn
Approach Bjorn at the Gallows Tree. Together with Bjorn you will say goodbye to his faithful friend and this quest will end. It doesn't matter which dialogue option you choose.
After completing this quest Bjorn will join your clan as a Jomsviking.
