Lord Lauur's Wife
DISCLAIMER: Your Steps and Tasks may be different
Talk to Dunfjall again after you have finished The Creatures of Myrkwood and Helping the Werewolves and he will give you a new quest called Lord Lauur's Wife. You will be sent to talk to Lord Lauur, who only spawns between 12a and 8a.
Lord Lauur is upset that his wife's spirit is being held by the two factions, svartalfar and arachite.
Next you talk to Hyua, the troll hiding behind a tree behind the merchants and stable master at Gna Faste. She will be happy that Lene's spirit was captured, then she will try to kill you. Kill her instead, and receive her diary.
You have to read the diary to find out what to do next, "use" the diary to read it.
When you read it, it will give you the location of Lene's spirit.
Te'Bui in Spindelhalla is the holder, kill him to get a white spirit crystal. Use this crystal to find out where next crystal is.
Kill an arachite tunnelhost to receive a black crystal, and take both to Lord Lauur so he can get his wife's spirit back.
After he puts the crystals together and restores his wife's spirit he is grateful and he gives you a reward for helping him.