A Walk Above the Clouds
I've discovered a Worm Cult cell has come to the ruins of a Dragon Cult stronghold. No good can come of this.
<The player finds a Grimoire with descriptions.
Talk to Nordahl, Perform the Ritual
I have all the reagents mentioned in the grimoire. I can now summon the leader's spirit from within his ritual circle.
Unseal the Entrance to the Dragon Cult Temple
I've learned from Nordahl that the entrance to Forelhorst proper is sealed by a puzzle. I need to work out the proper order of images on the stones before the doors.
Talk to Veldrana
I've recovered the Wuuthrad Shard. I should leave the peak and return to Veldrana to make sure she's all right.
— game journal
Note: It is necessary to stay warm! Running for too long in areas without fire places, the player character will soon start to freeze and die. The player finds the Nordahl's summoning circle ready and prepared with candles. These must be lit in the right order. The Animus Geode can be used to summon Nordahl's spirit, he'll be bound to it's place, but answer all questions.