I found what I think are two incongruities with the lore.
Dreki's description explains that it has chosen to bond with Ingvar. This is also mentioned in Ingvar's description. However, Ingar's level and class do not include Vaettir bond. The level and class for his son, Halfdan, does have Vaettir Bond listed but no mention of a bond is given anywhere. Since Dreki is the Vaettir in the region and they can only bond with one person, there isn't anyone for Halfdan to be bonded with. I'm guessing this was just a mix up on who got the Vaettir Bond.
Also, something that is a little confusing is the location of Hel's Needle. It's actual description clearly puts it in the sinkhole and seems to establish it as the source of the undead polar bears. It is also mentioned in Halfdan's description, but in a way that suggest it is located elsewhere. The text I'm referring to is below.
Quote:
"Among them is Hel’s Needle, a bone spire that reaches into the sky. He and his feral brothers have not yet discovered its secret, but they know it is a weapon of great power. They have also discovered a sinkhole of unimaginable proportion that is filled with creatures tainted by Niflheim."
The wording seems to suggest he discovered these things separately and thus at separate locations. This isn't that big of a deal really, but it would be better to clearly indicate they discovered Hel's Needle in the sinkhole. Removing small inconsistencies or ambiguities like that really help tighten up the lore.