This is a relatively simple quest which triggers immediately after completing Honor Bound. It’s recommended that you complete the tasks associated with Family Matters before moving on to this quest, but if you’d rather press on with the story, you won’t be missing anything invaluable.
The purpose of this quest is for Eivor to seek guidance from Valka the Seeress. You’ll find her in a hut to the northwest of Fornburg. You can head directly there from the path leading out of Fornburg to the northwest, or you can take a longer route beginning at the northeastern end of Fornburg, leading you to the synchronization point to the north. This will have the added benefit of revealing wealth and mysteries in the surrounding area, which would otherwise be hidden from view. Choose whichever path fits your appetite for exploration, so long as it ends with Valka’s Hut.
When you reach Valka’s Hut, enter through the main door to trigger a cutscene. After this you will be beckoned to follow a mysterious figure outside. This is soon revealed to be your adoptive brother, Sigurd. Continue to follow him up some steps and through the snow, until you reach an entrance. Go through the doors to trigger another cutscene, at the end of which you’ll find yourself back in Valka’s Hut. Once there, go through the dialogue options in the order of your choice (the outcome will be the same). When the conversation with Valka ends, the quest will complete.